An automatic control method and an automatic control device are provided. The automatic control device includes an automatic joint mechanism and a processor. The automatic joint mechanism includes a first motor and a second motor. The processor is adapted to perform a force adjustment on the first motor and the second motor. When a first motor state parameter of the first motor is different from a second motor state parameter of the second motor, the processor adjusts at least one of a first target position parameter of the first motor and a second target position parameter of the second motor, so that a degree of force of at least one of the first motor and the second motor is automatically and correspondingly adjusted.