A storage device with wireless router function includes a main module having a base board, and a network connector. A USB controller, a memory and a router chip are located on the base board. One end of the base board is equipped with a first connector. The USB controller, the memory and the first connector are coupled with the router chip. The storage device performs a data storage function via electrically plugging the first connector to an electronic product and accessing data in the memory. The network connector is electrically connected to the router chip of the base board. The network connector is capable of being further connected to a local area network via a wire link so as to make the storage device perform a wireless router function through the router chip providing a wireless LAN to wirelessly connect the electronic product with an internet.