diff --git a/api/@ohos.i18n.d.ts b/api/@ohos.i18n.d.ts
index 53ebb62f927b3cd9045f7c23b8bb0bdf1e157ee2..7de84c3ce6f70809d26306761d5668d93f15c9eb 100644
--- a/api/@ohos.i18n.d.ts
+++ b/api/@ohos.i18n.d.ts
@@ -17,7 +17,7 @@
  * Provides international settings related APIs.
  *
  * @since 7
- * @devices phone, table, tv, wearable, car
+ * @devices phone, tablet, tv, wearable, car
  */
 declare namespace i18n {
 /**
@@ -43,7 +43,7 @@ export function getDisplayCountry(country: string, locale: string, sentenceCase?
 export function getDisplayLanguage(language: string, locale: string, sentenceCase?: boolean): string;
 
 /**
- * Obtain all regions supported by the system.
+ * Obtain all languages supported by the system.
  *
  * @return Returns all languages supported by the system.
  * @since 7
diff --git a/api/@ohos.intl.d.ts b/api/@ohos.intl.d.ts
index 04ac9877a68fb6ae18b911d611f92bddbfc669ed..8755ac68148c7ea08999786029045b19224c6fc9 100755
--- a/api/@ohos.intl.d.ts
+++ b/api/@ohos.intl.d.ts
@@ -63,6 +63,157 @@ export class Locale {
      * @since 6
      */
     baseName: string
+
+    /**
+     * Indicates the case first style of the locale.
+     */
+    caseFirst: string
+
+    /**
+     * Indicates the calendar.
+     */
+    calendar: string
+
+    /**
+     * Indicates the collation.
+     */
+    collation: string
+
+    /**
+     * Indicates the hour cycle.
+     */
+    hourCycle:  string
+
+    /**
+     * Indicates the numbering system.
+     */
+    numberingSystem: string
+
+    /**
+     * Indicates whether it is numeric.
+     */
+    numeric: boolean
+
+    /**
+     * Convert the locale information to string.
+     *
+     * @return Returns locale information in string form.
+     */
+    toString(): string;
+
+    /**
+     * Maximize the locale's base information.
+     *
+     * @return Returns maximized locale.
+     */
+    maximize(): Locale;
+
+    /**
+     * Minimize the locale's base information.
+     *
+     * @return Returns minimized locale.
+     */
+    minimize(): Locale;
+}
+
+/**
+ * Provides the options of date time format.
+ */
+export interface DateTimeOptions {
+    /**
+     * Indicates the locale.
+     */
+    locale: string
+
+    /**
+     * Indicates the date style.
+     */
+    dateStyle: string
+
+    /**
+     * Indicates the time style.
+     */
+    timeStyle: string
+
+    /**
+     * Indicates the hour cycle.
+     */
+    hourCycle: string
+
+    /**
+     * Indicates the timezone.
+     */
+    timeZone: string
+
+    /**
+     * Indicates the numbering system.
+     */
+    numberingSystem: string
+
+    /**
+     * Indicates whether is 12 hour or not.
+     */
+    hour12: boolean
+
+    /**
+     * Indicates the weekday style.
+     */
+    weekday: string
+
+    /**
+     * Indicates the era style.
+     */
+    era: string
+
+    /**
+     * Indicates the year style.
+     */
+    year: string
+
+    /**
+     * Indicates the month style.
+     */
+    month: string
+
+    /**
+     * Indicates the day style.
+     */
+    day: string
+
+    /**
+     * Indicates the hour style.
+     */
+    hour: string
+
+    /**
+     * Indicates the minute style.
+     */
+    minute: string
+
+    /**
+     * Indicates the second style.
+     */
+    second: string
+
+    /**
+     * Indicates the timezone name.
+     */
+    timeZoneName: string
+
+    /**
+     * Indicates the day period format.
+     */
+    dayPeriod: string
+
+    /**
+     * Indicates the locale matching algorithm.
+     */
+    localeMatcher: string
+
+    /**
+     * Indicates the format matching algorithm.
+     */
+    formatMatcher: string
 }
 
 /**
@@ -76,9 +227,20 @@ export class DateTimeFormat {
      *
      * @param locale Indicates a character string containing the locale information, including
      *               the language and optionally the script and region, for the DateTimeFormat object.
+     * @param options Indicates the options used to format the date.
      * @since 6
      */
-    constructor(locale?: string);
+    constructor(locale: string, options?: DateTimeOptions);
+
+    /**
+     * A constructor used to create a DateTimeFormat object.
+     *
+     * @param locale Indicates an array of character string containing the locale information, including
+     *               the language and optionally the script and region, for the DateTimeFormat object.
+     * @param options Indicates the options used to format the date.
+     * @since 6
+     */
+    constructor(locale: Array<string>, options?: DateTimeOptions);
 
     /**
      * Obtains the formatted date strings.
@@ -88,6 +250,161 @@ export class DateTimeFormat {
      * @since 6
      */
     format(date: Date): string;
+
+    /**
+     * Obtains the formatted date strings of a date range.
+     *
+     * @param startDate Indicates the start date of the date range.
+     * @param endDate Indicates the end date of the date range.
+     * @return Returns a date string formatted based on the specified locale.
+     * @since 6
+     */
+    formatRange(startDate: Date, endDate: Date): string;
+
+    /**
+     * Obtains the options of the DateTimeFormat object.
+     *
+     * @return Returns the options of the DateTimeFormat object.
+     * @since 6
+     */
+    resolvedOptions(): DateTimeOptions;
+}
+
+/**
+ * Provides the options of number format.
+ */
+export interface NumberOptions {
+    /**
+     * Indicates the locale.
+     */
+    locale: string
+
+    /**
+     * Indicates the currency.
+     */
+    currency: string
+
+    /**
+     * Indicates the currency sign.
+     */
+    currencySign: string
+
+    /**
+     * Indicates the currency display format.
+     */
+    currencyDisplay: string
+
+    /**
+     * Indicates the unit.
+     */
+    unit: string
+
+    /**
+     * Indicates the unit display format.
+     */
+    unitDisplay: string
+
+    /**
+     * Indicates the sign display format.
+     */
+    signDisplay: string
+
+    /**
+     * Indicates the compact display format.
+     */
+    compactDisplay: string
+
+    /**
+     * Indicates the notation.
+     */
+    notation: string
+
+    /**
+     * Indicates the locale matching algorithm.
+     */
+    localeMatcher: string
+
+    /**
+     * Indicates the style.
+     */
+    style: string
+
+    /**
+     * Indicates the numbering system.
+     */
+    numberingSystem: string
+
+    /**
+     * Indicates whether using grouping or not.
+     */
+    useGrouping: boolean
+
+    /**
+     * Indicates the minimum integer digits.
+     */
+    minimumIntegerDigits: number
+
+    /**
+     * Indicates the minimum fraction digits.
+     */
+    minimumFractionDigits: number
+
+    /**
+     * Indicates the maximum fraction digits.
+     */
+    maximumFractionDigits: number
+
+    /**
+     * Indicates the minimum significant digits.
+     */
+    minimumSignificantDigits: number
+
+    /**
+     * Indicates the maximum significant digits.
+     */
+    maximumSignificantDigits: number
+}
+
+/**
+ * Provides the API for formatting number strings.
+ */
+export class NumberFormat {
+    /**
+     * A constructor used to create a NumberFormat object.
+     *
+     * @param locale Indicates a character string containing the locale information, including
+     *               the language and optionally the script and region, for the NumberFormat object.
+     * @param options Indicates the options used to format the number.
+     * @since 6
+     */
+    constructor(locale: string, options?: NumberOptions);
+
+    /**
+     * A constructor used to create a NumberFormat object.
+     *
+     * @param locale Indicates an array of character string containing the locale information, including
+     *               the language and optionally the script and region, for the NumberFormat object.
+     * @param options Indicates the options used to format the number.
+     * @since 6
+     */
+    constructor(locale: Array<string>, options?: NumberOptions);
+
+    /**
+     * Obtains the formatted number string.
+     *
+     * @param number Indicates the number to be formatted.
+     * @return Returns a number string formatted based on the specified locale.
+     * @since 6
+     */
+    format(number: number): string;
+
+    /**
+     * Obtains the options of the NumberFormat object.
+     *
+     * @return Returns the options of the NumberFormat object.
+     * @since 6
+     */
+    resolvedOptions(): NumberOptions;
 }
 }
 export default intl;
\ No newline at end of file