A hot spot device includes an embedded processing module, a network connection module, and a terminal connection module. The embedded processing module controls the network connection module to connect to Internet, and also controls the network connection module to communicate with the terminal connection module. The terminal connection module includes a station (STA) chip and a first antenna. The STA chip receives from the embedded processing module data information obtained from the Internet through the network connection module, processes the data information, and transmits the data information to a certain area through the first antenna, so as to realize wireless signal coverage in the area. The STA chip also receives data information transmitted by wireless local area network (WLAN) equipment from the first antenna, processes the data information, outputs the processed data information to the embedded processing module for sending the processed data information to the Internet through the embedded processing module and network connection module.