The invention discloses a double-acting rotating speed controllable displacement 
machine, which comprises a driving mechanism, a lifting mechanism, a lifting 
cantilever beam, a rotary hanging mechanism, an anti-collision mechanism, a control mechanism and a 
mobile phone provided with an app program. According to the displacement 
machine provided by the invention, two driving mechanical structures,namely an electric mode and a manual mode, are offered, and two driving 
modes can be independently installed and simultaneously installed; and the two driving 
modes, when simultaneously installed, can be switched in real time, without mutual interference. The displacement 
machine provided by the invention can be conveniently applied under power failure and moist environments, so that shortcomingsof simple manual (hydraulic) transmission or simple motor driving can be overcome. In addition, the displacement machine can be also applied to an 
intelligent control technology under 
electric control; through simple operations of the APP program of the 
mobile phone and a 
wireless Bluetooth technology, movement and rotation, under 
autonomous control, of a patient can be achieved, so that autonomous displacement of the patient is implemented; and certainly, the displacement machine, under the control of 
nursing personnel in an other-
control mode, can also achieve other-control displacement ofthe patient.