This specification describes techniques for blockchain-based smart contract call. One example method includes receiving a target transaction initiated by a client device of a blockchain, wherein the target transaction is preconfigured for a call rule used to initiate a call for a smart contract; obtaining the call rule preconfigured for the target transaction; executing the call rule to initiate a call for a target smart contract; and providing a call result to the client device when the call for the target smart contract is completed.