The invention discloses a GIS based shared item payment system. The system comprises a background terminal and a mobile terminal. The background terminal includes a first processor, a geographic information collector, a storage module, a direction detector, a payment link sending module, a data receiving module, an unlocking module, and a locking module. The direction detector is arranged at a return position. The first processor is connected with the geographic information collector, the storage module, the direction detector, the payment link sending module, the data receiving module, the unlocking module, and the locking module. The mobile terminal includes a second processor, a GIS module, and a payment module. The second processor is connected with the GIS module and the payment module separately. The GIS module is connected with the data receiving module. According to the GIS based shared item payment system, the existing code scanning payment and manual locking modes are replaced, the risk of code scanning is prevented, and forgetting to lock is also prevented. The system is intelligent and safe, and is convenient to use.