The invention discloses an automatic liquid soap or disinfectant liquid supply device and an automatic liquid supply device. The automatic liquid soap or disinfectant liquid supply device comprises a fixation base, and a motor is arranged on the fixation base; the device is characterized in that a press cam is connected to a motor shaft of the motor, inductive transmitting receivers which can control the motor to work are arranged on two sides of the front end of the fixation base respectively, and the inductive transmitting receivers are electrically connected with the motor. The device is simple in structure and is suitable for being used on a general liquid soap bottle or a general disinfectant liquid bottle; the motor is cooperated with the press cam so that a movable press block in a guidepost can move downward steadily, and accordingly it is guaranteed that the force applied on a pump body press head is uniform and the quantity of produced liquid is balanced; according to the device, the inductive transmitting receivers are arranged on two sides of the front end of the fixation base respectively, and when two sides of the inductive transmitting receivers sense that hands or articles extend into an inductive zone simultaneously, the inductive transmitting receivers control the motor to work. The device effectively prevents mistaken press, is sensitive in induction, prevents waste and improves safety.