diff --git a/src/common/graph/Response.h b/src/common/graph/Response.h
index e63849812..d526fe399 100644
--- a/src/common/graph/Response.h
+++ b/src/common/graph/Response.h
@@ -17,21 +17,167 @@
 namespace nebula {
 
 enum class ErrorCode {
+    // for common code
     SUCCEEDED                         = 0,
+
     E_DISCONNECTED                    = -1,        // RPC Failure
     E_FAIL_TO_CONNECT                 = -2,
     E_RPC_FAILURE                     = -3,
+    E_LEADER_CHANGED                  = -4,
+
+
+    // only unify metad and storaged error code
+    E_SPACE_NOT_FOUND                 = -5,
+    E_TAG_NOT_FOUND                   = -6,
+    E_EDGE_NOT_FOUND                  = -7,
+    E_INDEX_NOT_FOUND                 = -8,
+    E_EDGE_PROP_NOT_FOUND             = -9,
+    E_TAG_PROP_NOT_FOUND              = -10,
+    E_ROLE_NOT_FOUND                  = -11,
+    E_CONFIG_NOT_FOUND                = -12,
+    E_GROUP_NOT_FOUND                 = -13,
+    E_ZONE_NOT_FOUND                  = -14,
+    E_LISTENER_NOT_FOUND              = -15,
+    E_PART_NOT_FOUND                  = -16,
+    E_KEY_NOT_FOUND                   = -17,
+    E_USER_NOT_FOUND                  = -18,
+
+    // backup failed
+    E_BACKUP_FAILED                   = -24,
+    E_BACKUP_EMPTY_TABLE              = -25,
+    E_BACKUP_TABLE_FAILED             = -26,
+    E_PARTIAL_RESULT                  = -27,
+    E_REBUILD_INDEX_FAILED            = -28,
+    E_INVALID_PASSWORD                = -29,
+    E_FAILED_GET_ABS_PATH             = -30,
+
+
+    // 1xxx for graphd
     E_BAD_USERNAME_PASSWORD           = -1001,     // Authentication error
     E_SESSION_INVALID                 = -1002,     // Execution errors
     E_SESSION_TIMEOUT                 = -1003,
     E_SYNTAX_ERROR                    = -1004,
     E_EXECUTION_ERROR                 = -1005,
     E_STATEMENT_EMPTY                 = -1006,     // Nothing is executed When command is comment
-    E_USER_NOT_FOUND                  = -18,
+
     E_BAD_PERMISSION                  = -1008,
     E_SEMANTIC_ERROR                  = -1009,     // semantic error
     E_TOO_MANY_CONNECTIONS            = -1010,     // Exceeding the maximum number of connections
     E_PARTIAL_SUCCEEDED               = -1011,
+
+
+    // 2xxx for metad
+    E_NO_HOSTS                        = -2001,     // Operation Failure
+    E_EXISTED                         = -2002,
+    E_INVALID_HOST                    = -2003,
+    E_UNSUPPORTED                     = -2004,
+    E_NOT_DROP                        = -2005,
+    E_BALANCER_RUNNING                = -2006,
+    E_CONFIG_IMMUTABLE                = -2007,
+    E_CONFLICT                        = -2008,
+    E_INVALID_PARM                    = -2009,
+    E_WRONGCLUSTER                    = -2010,
+
+    E_STORE_FAILURE                   = -2021,
+    E_STORE_SEGMENT_ILLEGAL           = -2022,
+    E_BAD_BALANCE_PLAN                = -2023,
+    E_BALANCED                        = -2024,
+    E_NO_RUNNING_BALANCE_PLAN         = -2025,
+    E_NO_VALID_HOST                   = -2026,
+    E_CORRUPTTED_BALANCE_PLAN         = -2027,
+    E_NO_INVALID_BALANCE_PLAN         = -2028,
+
+
+    // Authentication Failure
+    E_IMPROPER_ROLE                   = -2030,
+    E_INVALID_PARTITION_NUM           = -2031,
+    E_INVALID_REPLICA_FACTOR          = -2032,
+    E_INVALID_CHARSET                 = -2033,
+    E_INVALID_COLLATE                 = -2034,
+    E_CHARSET_COLLATE_NOT_MATCH       = -2035,
+
+    // Admin Failure
+    E_SNAPSHOT_FAILURE                = -2040,
+    E_BLOCK_WRITE_FAILURE             = -2041,
+    E_REBUILD_INDEX_FAILURE           = -2042,
+    E_INDEX_WITH_TTL                  = -2043,
+    E_ADD_JOB_FAILURE                 = -2044,
+    E_STOP_JOB_FAILURE                = -2045,
+    E_SAVE_JOB_FAILURE                = -2046,
+    E_BALANCER_FAILURE                = -2047,
+    E_JOB_NOT_FINISHED                = -2048,
+    E_TASK_REPORT_OUT_DATE            = -2049,
+    E_INVALID_JOB                     = -2065,
+
+    // Backup Failure
+    E_BACKUP_BUILDING_INDEX           = -2066,
+    E_BACKUP_SPACE_NOT_FOUND          = -2067,
+
+    // RESTORE Failure
+    E_RESTORE_FAILURE                 = -2068,
+    E_SESSION_NOT_FOUND               = -2069,
+
+    // ListClusterInfo Failure
+    E_LIST_CLUSTER_FAILURE              = -2070,
+    E_LIST_CLUSTER_GET_ABS_PATH_FAILURE = -2071,
+    E_GET_META_DIR_FAILURE              = -2072,
+
+
+    // 3xxx for storaged
+    E_CONSENSUS_ERROR                 = -3001,
+    E_KEY_HAS_EXISTS                  = -3002,
+    E_DATA_TYPE_MISMATCH              = -3003,
+    E_INVALID_FIELD_VALUE             = -3004,
+    E_INVALID_OPERATION               = -3005,
+    E_NOT_NULLABLE                    = -3006,     // Not allowed to be null
+    // The field neither can be NULL, nor has a default value
+    E_FIELD_UNSET                     = -3007,
+    // Value exceeds the range of type
+    E_OUT_OF_RANGE                    = -3008,
+    // Atomic operation failed
+    E_ATOMIC_OP_FAILED                = -3009,
+    E_DATA_CONFLICT_ERROR             = -3010,  // data conflict, for index write without toss.
+
+    E_WRITE_STALLED                   = -3011,
+
+    // meta failures
+    E_IMPROPER_DATA_TYPE              = -3021,
+    E_INVALID_SPACEVIDLEN             = -3022,
+
+    // Invalid request
+    E_INVALID_FILTER                  = -3031,
+    E_INVALID_UPDATER                 = -3032,
+    E_INVALID_STORE                   = -3033,
+    E_INVALID_PEER                    = -3034,
+    E_RETRY_EXHAUSTED                 = -3035,
+    E_TRANSFER_LEADER_FAILED          = -3036,
+    E_INVALID_STAT_TYPE               = -3037,
+    E_INVALID_VID                     = -3038,
+    E_NO_TRANSFORMED                  = -3039,
+
+    // meta client failed
+    E_LOAD_META_FAILED                = -3040,
+
+    // checkpoint failed
+    E_FAILED_TO_CHECKPOINT            = -3041,
+    E_CHECKPOINT_BLOCKED              = -3042,
+
+    // Filter out
+    E_FILTER_OUT                      = -3043,
+    E_INVALID_DATA                    = -3044,
+
+    E_MUTATE_EDGE_CONFLICT            = -3045,
+    E_MUTATE_TAG_CONFLICT             = -3046,
+
+    // transaction
+    E_OUTDATED_LOCK                   = -3047,
+
+    // task manager failed
+    E_INVALID_TASK_PARA               = -3051,
+    E_USER_CANCEL                     = -3052,
+    E_TASK_EXECUTION_FAILED           = -3053,
+
+    E_UNKNOWN                         = -8000,
 };
 
 template <typename T>