Power control device for construction machine

The invention claims a construction machine power control device (500), wherein the construction machine with an engine (100), a actuator of the engine (100) power device; when without need to drive the driving device is a motor (100) automatic with the engine control part (510), and a cab on the top of air conditioner (200), a characterised by, wherein the top and detecting part (520) for detecting the rotating air conditioner (200) is a work, wherein the engine power secondary otherwise judge the part (530) judgment for without requirement the engine (100) power, preventing by an engine (100) automatic end of the engine control part (510) and a.