A positioning apparatus and the associated positioning method are provided. The positioning apparatus includes a wireless communication unit, a storage unit, a positioning module and a control unit. The wireless communication unit generates a detection signal. The storage unit coupled to the wireless communication module stores assistance positioning data. The positioning module coupled to the storage unit generates coordinate information according to a satellite signal and the assistance positioning data. The control unit coupled to the wireless communication module, the storage unit and the positioning module determines whether the assistance positioning data is valid. When the assistance positioning data is invalid, the control unit controls the wireless communication module to generate the detection signal.