An automatic uploading method, comprising the steps of: receiving a wake-up signal by a low-power-consumption wireless transmission module of a portable information capturing device; actuating a high-power-consumption wireless transmission module of the portable information capturing device according to the wake-up signal; creating a connection between the high-power-consumption wireless transmission module and a first relay station after the high-power-consumption wireless transmission module has been actuated; shutting down the low-power-consumption wireless transmission module after the connection has been created; and transmitting, via the connection, an upload data of the portable information capturing device to a second relay station, wherein the second relay station is connected to the first relay station.