Provided is a method for detecting power consumption of an application, including following steps: when a screen of a mobile terminal is turned on, detecting wakeup times, wake-lock time duration and CPU utilization of applications in the time duration of screen-off by a device for detecting power consumption of an application; prompting that power consumption of an application is abnormal by said device when said application satisfies at least one of following conditions: wakeup tunes reach a first threshold value; wake-lock time duration reaches a second threshold value; CPU utilization reaches a third threshold value. The method provided in the present disclosure is capable of detecting whether power consumption of an application is abnormal. In addition, the present disclosure further provides a device and a computer storage medium for detecting power consumption of an application.