Abstract: The present disclosure provides a crane machine having a rotatable arm, including: a main body, the rotatable arm, a rotation drive assembly, an elevation drive assembly, and a gripper. The main body defines a holding cavity and a conveying channel; wherein the conveying channel includes an opening that is in communication with the holding cavity. The rotatable arm is arranged in the holding cavity. The rotation drive assembly includes a first driving member configured to drive the rotatable arm to rotate around the centerline. The elevation drive assembly is arranged in the rotatable arm and includes a second driving member and a rotation wheel. The gripper is connected to the rotation wheel through a connection rope; the opening is disposed on a rotational radius of the gripper.