A monitor with an adjustable angle and operating method thereof. The monitor includes a rotation component to control display angle, an OSD (On Screen Display) module, a microprocessor and a motor. The OSD module provides an interface from which a target angle can be selected, and the OSD module transmits a first control signal corresponding to the target angle to the microprocessor. The microprocessor transmits a second control signal corresponding to the first control signal to the motor. The motor drives the rotation component to automatically adjust angle of the monitor to the target angle according to the second control signal.