Abstract: A processing method for order data in a network payment system. The processing method includes: receiving an order instruction issued from a user terminal; generating an order data including a connected user account information according to the order instruction; sending the order data and prompting a confirmation to the user terminal and notifying the user terminal to send the order data to a network bank system in response to a receiving of a confirmation instruction from a user account and thereby configuring the network bank system to verify the order data; and presenting the order data including the connected user account information to the user terminal after the network bank system returning that a corresponding verification result is positive. A processing system for order data in a network payment system is also provided. Thus, the network payment system has higher data security.