The present invention discloses a wearable apparatus and a controlling method thereof. The wearable apparatus includes a positioning module, a local wireless communication module and a processor module. The positioning module is used to receive the first positioning information selectively, the local wireless communication module is suitable for being in communication connection with an electronic device, and the processing module is coupled to the positioning module and the local wireless communication module, is used to send a request command through the local wireless communication module to the electronic device for inquiring second positioning information generated by the electronic device. In response to the processor module receives a valid request response comprising the second positioning information from the electronic apparatus, the processor module is further adapted to locate the wearable apparatus according to the second positioning information. In response to the processor module receives an invalid request response from the electronic apparatus, the processor module is further adapted to activate the positioning module to receive the first positioning information, and locate the wearable apparatus according to the first positioning information. A portable device can reduce the overall power consumption in a positioning program.