In order to achieve seamless precise positioning in indoor and outdoor environment

an intelligent switching algorithm based on counting and threshold mechanism is proposed

which avoids the waste of computation burden caused by repeated switching of positioning system

and reduces the energy consumption of smart phone

realizes seamless connectivity of outdoor global positioning system（ GPS） satellite positioning technology and indoor Wi-Fi location fingerprint positioning technology. The algorithm uses GPS satellite positioning technology to locate in the outdoor environment

and switches to the GPS/Wi-Fi fusion positioning algorithm at the indoor and outdoor junction

and then switch to the Wi-Fi location fingerprint localization algorithm after entering indoor. Experiments are carried out based on real laboratory scenarios

and the experimental data show that the algorithm can meet the needs of indoor and outdoor seamless positioning.