An electric valve control device for controlling a valve opening degree of an electric valve including a valve body and a stepping motor driving the valve body, wherein the electric valve control device is configured to provide an initialization process and an interrupted process, wherein the initialization process comprises following operations being performed sequentially, - starting an electric valve initialization operation when an initialization operation instruction signal is received from an air conditioner ECU, - transmitting a signal indicating the electric valve initialization operation to the air conditioner ECU during the electric valve initialization operation, - transmitting an initialization operation end signal to the air conditioner ECU when the electric valve initialization operation ends, - configuring the electric valve to enter a normal operation state when a normal operation instruction signal is received from the air conditioner ECU, and - transmitting a signal indicating the electric valve entered the normal operation state to the air conditioner ECU, characterized in that the interrupted process comprises following operations being performed sequentially, - starting an electric valve initialization operation when an initialization operation instruction signal is received from the air conditioner ECU, - transmitting a signal indicating the electric valve initialization operation to the air conditioner ECU during the electric valve initialization operation, - interrupting the electric valve initialization operation when an initialization operation interruption instruction signal is received from the air conditioner ECU during the electric valve initialization operation, - transmitting an initialization operation interruption signal to the air conditioner ECU, - configuring the electric valve to enter a normal operation state when a normal operation instruction signal is received from the air conditioner ECU, and - transmitting a signal indicating the electric valve entered the normal operation state to the air conditioner ECU, wherein the electric valve control device further comprises a storage unit storing a current position of the electric valve, wherein when the initialization operation is interrupted during the initialization operation, the valve opening degree of the electric valve is further controlled on the basis of the current position stored in the storage unit (11 e). - starting an electric valve initialization operation when an initialization operation instruction signal is received from an air conditioner ECU, - transmitting a signal indicating the electric valve initialization operation to the air conditioner ECU during the electric valve initialization operation, - transmitting an initialization operation end signal to the air conditioner ECU when the electric valve initialization operation ends, - configuring the electric valve to enter a normal operation state when a normal operation instruction signal is received from the air conditioner ECU, and - transmitting a signal indicating the electric valve entered the normal operation state to the air conditioner ECU, characterized in that the interrupted process comprises following operations being performed sequentially, - starting an electric valve initialization operation when an initialization operation instruction signal is received from the air conditioner ECU, - transmitting a signal indicating the electric valve initialization operation to the air conditioner ECU during the electric valve initialization operation, - interrupting the electric valve initialization operation when an initialization operation interruption instruction signal is received from the air conditioner ECU during the electric valve initialization operation, - transmitting an initialization operation interruption signal to the air conditioner ECU, - configuring the electric valve to enter a normal operation state when a normal operation instruction signal is received from the air conditioner ECU, and - transmitting a signal indicating the electric valve entered the normal operation state to the air conditioner ECU,