The invention discloses a method of managing and controlling Android 
smart device cameras based on a device manager. The method comprises the steps of: activating the device manager, and obtaining an example of the device manager; obtaining an example of a device strategy manager; detecting whether or not the device manager's control over the camera is activated, if not, using startActivity() to pop-up device manager permission activation window to activate the device mager's control over the camera; using the device strategy manager example to call the 
camera control interface to open or close the camera. In the method, the camera is managed and controlled by the Android 
system device manager, the level of manage and control is high, the Apps are all within the scope of control whether come from the 
system or 
third party, the method can make the photo and video function completely invalid, and this method cannot be avoided and the camera cannot be used; moreover, the method has no influence on other functions of the Android 
smart phone, the method will not bring other inconvenience for users, and meet different needs in various occasions.