The invention discloses an environment detection device, an inserting detection method, a power supply control method. The environment detection device comprises a housing which is of a hollowed ball shape, a power supply module, a data collection module and a control module, wherein the power supply module, the data collection module and the control module are arranged inside the hollowed-ball-shaped housing and are connected with each other. The environment detection device is characterized by providing with a reserved inserting hole. The environment detection device also comprises a detection module which is connected to the control module. The detection module is used for detecting whether a plug is plugged in the inserting hole, if yes, a plugging signal is transmitted to the control module. After the control module receives the plugging signal, the power supply module is controlled to supply power to the data collection module. The environment detection device disclosed by the invention realizes the simple and effective control of the power supply module, and prevents the phenomenon that when the environment detection device roll and encounters the small and sharp obstacles, the system can be mistakenly shut down or started up.