The invention discloses a stepping motor control device and method. The stepping motor control device comprises a driver, a battery, a signal generator, a stepping motor indication lamp, an angle sensor, a relay, a fan, a direction control button, a pulse adjustment button, an off-line button and an overcurrent protector, wherein the direction control button, the pulse adjustment button and the off-line button are arranged in the signal generator and are all connected with the driver via harnesses, a common anode harness is arranged on the signal generator, the signal generator is connected with the driver via the common anode harness, one end of the driver is sequentially connected with the overcurrent protector and the battery, one end of the driver is connected with the angle sensor anda stepping motor, the angle sensor is used for detecting a rotation angle of the stepping motor and sending the acquired angle to the driver, the stepping motor is sequentially connected with a firsttemperature sensor, a second temperature sensor and the driver, and a fan is arranged in the stepping motor and is sequentially connected with a relay and the driver.