Signal switching system and method based on wifi signal and lte signal

The invention discloses a signal switching system and method based on a wifi signal and a lte signal, belongs to the technical field of mobile phone network connection, and aims to solve the technical problem of how to ensure that a mobile phone preferentially uses a cellular mobile data network so as to ensure the stability of a mobile phone signal. Comprising the following steps that whether signal mode switching service is started or not is selected, and switching threshold values are configured and comprise a wifi signal strength threshold value, a wifi signal duration threshold value and a wifi signal distance threshold value; detecting the distance between the electronic terminal and the wifi signal source, the wifi signal strength and the duration of the wifi signal strength in real time; and based on the obtained distance between the electronic terminal and the wifi signal source, the wifi signal strength of the electronic terminal and the duration of the wifi signal strength of the electronic termina