TOPOS stands for "Tokenized Open Payment Operating System".Built on blockchain technology, TOPOS adheres to the OPEN LOOP multi-party architecture. Anyone can utilize the blockchain capabilities provided by TOPOS to assemble the final payment services within this ecosystem. Merchants and users can hold Web3 assets without the need for a custodian, relying instead on acquirers, wallet institutions, and developers of Tokenized Money payment scenario standards to complete payments and exchange value. Similar to the VISA/MASTERCARD system, parties in payment take on different roles to complete their tasks and earn profits.