A data-interoperability-oriented trusted processing method and system applied to a P2P network system are provided. The P2P network system includes a plurality of nodes. The trusted processing method includes a storage method and a query method. Firstly, a directed acyclic graph ledger structure is employed to be matched with an nRW consensus mechanism during a storage process, so that a supervision problem in a large-scale sharing exchange process is solved. Secondly, in a query process, a P2P network system is optimized by maintaining a tree structure with high fault tolerance and load balance through a hop optimization method to construct the P2P network system with a relatively balanced network, so that a query delay is not greatly influenced on the premise of ensuring the load balance, and an expandability of the system is ensured.