diff --git a/sdk/package.json b/sdk/package.json
index dcc2b530..11d127ed 100644
--- a/sdk/package.json
+++ b/sdk/package.json
@@ -1,6 +1,6 @@
 {
     "name": "db3.js",
-    "version": "0.4.1",
+    "version": "0.4.6",
     "description": "DB3 Network Javascript API",
     "author": "dbpunk labs",
     "keywords": [
diff --git a/sdk/src/index.ts b/sdk/src/index.ts
index aaba2b9b..904cd043 100644
--- a/sdk/src/index.ts
+++ b/sdk/src/index.ts
@@ -22,6 +22,7 @@ export {
     createFromExternal,
 } from './account/db3_account'
 export type { Client, ReadClient } from './client/types'
+export type { DocumentData, DocumentEntry } from './client/base'
 export type {
     Database,
     Collection,
@@ -30,7 +31,7 @@ export type {
     MutationResult,
     QueryResult,
 } from './store/types'
-export { addDoc, updateDoc, deleteDoc, queryDoc } from './store/document_v2'
+export { addDoc, updateDoc, deleteDoc, queryDoc, getDoc } from './store/document_v2'
 
 export { SystemConfig, SystemStatus, Version } from './proto/db3_base'
 export {
diff --git a/sdk/src/store/document_v2.ts b/sdk/src/store/document_v2.ts
index 61922907..9c9baef6 100644
--- a/sdk/src/store/document_v2.ts
+++ b/sdk/src/store/document_v2.ts
@@ -116,6 +116,19 @@ export async function queryDoc<T = DocumentData>(
     }
 }
 
+/**
+ *
+ * This function gets a document from the database by its ID.
+ *
+ * ```ts
+ * const doc = await getDoc(collection, "10")
+ * const id = doc.id
+ * const content = doc.doc
+ * ```
+ * @param col    - the instance of collection
+ * @param id     - the id of document
+ * @returns the {@link DocumentEntry} if the document was found. Otherwise, raises an error.
+ **/
 export async function getDoc<T = DocumentData>(col: Collection, id: string) {
     const response = await col.db.client.indexer.getDoc(
         col.db.addr,
diff --git a/sdk/tests/client_v2.test.ts b/sdk/tests/client_v2.test.ts
index 982e392f..0452fe85 100644
--- a/sdk/tests/client_v2.test.ts
+++ b/sdk/tests/client_v2.test.ts
@@ -36,6 +36,7 @@ import {
     deleteDoc,
     updateDoc,
     queryDoc,
+    getDoc
 } from '../src/store/document_v2'
 import {
     createFromPrivateKey,
@@ -370,6 +371,21 @@ describe('test db3.js client module', () => {
                     age: 1,
                 })
                 await new Promise((r) => setTimeout(r, 1000))
+                {
+                    const doc = await getDoc(collection, doc2Ret.id)
+                    expect(doc).toBeDefined()
+                    expect(doc.id).toBe(doc2Ret.id)
+                    expect(doc.doc.city).toBe('beijing2')
+                    expect(doc.doc.author).toBe('imotai1')
+                    expect(doc.doc.age).toBe(1)
+                }
+                {
+                    try {
+                        const doc = await getDoc(collection, 1000000000000)
+                        except(1).toBe(0)
+                    } catch(e) {}
+                }
+
                 {
                     const queryStr = '/[city = beijing]'
                     const resultSet = await queryDoc<Profile>(
@@ -465,6 +481,7 @@ describe('test db3.js client module', () => {
                     age: 10,
                 })
                 await new Promise((r) => setTimeout(r, 2000))
+
                 {
                     const queryStr = '/[city = beijing]'
                     const resultSet = await queryDoc<Profile>(
diff --git a/src/storage/src/doc_store.rs b/src/storage/src/doc_store.rs
index 5854cce1..d83d0700 100644
--- a/src/storage/src/doc_store.rs
+++ b/src/storage/src/doc_store.rs
@@ -346,7 +346,7 @@ mod tests {
     fn doc_get_test() {
         let (doc_store, id) = prepare_the_dataset();
         let doc_str = r#"{"f2":"f2", "f1":"f1"}"#;
-        if let Ok(value) = doc_store.get_doc(&DB3Address::ZERO, "col1", id) {
+        if let Ok(Some(value)) = doc_store.get_doc(&DB3Address::ZERO, "col1", id) {
             let value: serde_json::Value = serde_json::from_str(value.as_str()).unwrap();
             let right: serde_json::Value = serde_json::from_str(doc_str).unwrap();
             assert_eq!(value, right);
@@ -414,7 +414,7 @@ mod tests {
     fn doc_store_smoke_test() {
         let (doc_store, id) = prepare_the_dataset();
         let db_id = DB3Address::ZERO;
-        if let Ok(value) = doc_store.get_doc(&db_id, "col1", id) {
+        if let Ok(Some(value)) = doc_store.get_doc(&db_id, "col1", id) {
             println!("{}", value.as_str());
             let value: serde_json::Value = serde_json::from_str(value.as_str()).unwrap();
             assert_eq!(value["f1"].as_str(), Some("f1"));
@@ -472,7 +472,7 @@ mod tests {
             assert!(false);
         }
 
-        if let Ok(value) = doc_store.get_doc(&db_id, "col1", id) {
+        if let Ok(Some(value)) = doc_store.get_doc(&db_id, "col1", id) {
             let value: serde_json::Value = serde_json::from_str(value.as_str()).unwrap();
             assert_eq!(value["test"].as_str(), Some("v2"));
         } else {