The invention discloses a method and a device capable of judging whether a terminal is switched between two wireless networks. The method comprises the following steps: judging whether the signal intensity of a first wireless network on the position of the terminal which is accessed to the first wireless network satisfies a first switching condition, if does not satisfy, judging not to switch; otherwise, judging whether the switching times in a first period satisfy a second switching condition, if does not satisfy, judging not to switch, and otherwise judging the terminal to be switched. The invention further discloses a method capable of judging whether the terminal is switched from the second wireless network to the first wireless network, and the device capable of judging whether the terminal is switched between the two networks. The signal strength is used as a first condition to judge whether the terminal is switched between networks, when the switching conditions are satisfied, the switching times in unit time are used for deciding whether to be switched, so that the ping-pong switching phenomena between different networks are reduced, and energy consumption and network source cost brought by the terminal are reduced.