Method for Determining that Terminal Device is Located Inside Geofence and Terminal Device

A positioning library creation method implemented by a server, wherein the positioning library creation method comprises:

• receiving communication access information and a first geographical location that are from at least one terminal device;
• constructing a positioning library, wherein the positioning library comprises a correspondence between the communication access information and a second geographical location, and wherein the second geographical location is based on the first geographical location;
• and
• delivering the positioning library to the at least one terminal device.

A device, comprising:

• a memory configured to store instructions;
• and
• a processor coupled to the memory and configured to execute the instructions to cause the device to be configured to:
• store a positioning library comprising communication access information and corresponding geographical information;
• obtain, based on the positioning library, a first geographical location corresponding to the communication access information;
• start a positioning module to obtain a second geographical location of the device when a location relationship between the first geographical location and a geofence meets a first preset condition;
• and
• determining, based on the second geographical location, that the device is located inside the geofence.