diff --git a/docs/sql/functions.md b/docs/sql/functions.md
index 90a09e503..0415e7b83 100644
--- a/docs/sql/functions.md
+++ b/docs/sql/functions.md
@@ -13,4 +13,5 @@ Kyuubi provides several auxiliary SQL functions as supplement to Spark's [Built-
 Name | Description | Return Type | Since
 --- | --- | --- | ---
 kyuubi_version | Return the version of Kyuubi Server | string | 1.3.0
+system_user | Return the system user name for the associated query engine | string | 1.3.0
 
diff --git a/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala b/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala
index 98c4077fd..14c837af8 100644
--- a/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala
+++ b/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala
@@ -36,6 +36,13 @@ object KDFRegistry {
     "string",
     "1.3.0")
 
+  val system_user: KyuubiDefinedFunction = create(
+    "system_user",
+    udf(() => System.getProperty("user.name")).asNonNullable(),
+    "Return the system user name for the associated query engine",
+    "string",
+    "1.3.0")
+
   def create(
     name: String,
     udf: UserDefinedFunction,
diff --git a/kyuubi-common/src/test/scala/org/apache/kyuubi/operation/JDBCTests.scala b/kyuubi-common/src/test/scala/org/apache/kyuubi/operation/JDBCTests.scala
index 660a1f046..fa0ed60bb 100644
--- a/kyuubi-common/src/test/scala/org/apache/kyuubi/operation/JDBCTests.scala
+++ b/kyuubi-common/src/test/scala/org/apache/kyuubi/operation/JDBCTests.scala
@@ -359,4 +359,12 @@ trait JDBCTests extends BasicJDBCTests {
       assert(rs.getString(1) == KYUUBI_VERSION)
     }
   }
+
+  test("kyuubi defined function - system_user") {
+    withJdbcStatement() { statement =>
+      val rs = statement.executeQuery("SELECT system_user()")
+      assert(rs.next())
+      assert(rs.getString(1) == System.getProperty("user.name"))
+    }
+  }
 }