A sensing data reading device and method applied to an electronic device are provided. The sensing data reading device supports a first operating system and a second operating system. The sensing data reading device includes: a sensing module for generating at least a sensing data; a hub coupled to the sensing module and adapted to read at least a sensing data; and a control circuit coupled to the sensing module and the hub to read at least a sensing data directly as soon as the electronic device switches to the first operating system and send a control signal to the hub as soon as the electronic device switches to the second operating system such that the hub reads the at least a sensing data. The sensing data reading device and method dispense with a switch circuit, thereby saving circuit area and cutting costs.