A method and apparatus for trust management in an integrated network, the integrated network comprising a plurality of different communication networks, each of a plurality of different communication networks comprising at least one miner node, at least one authentication node, and at least one network node. A blockchain system is constituted by miner nodes in the different communication networks. A block of a blockchain of the blockchain system comprises an identity of a previous block of the blockchain, a timestamp of generation of the block, a trust value list that contains a trust value of each of at least one network node in the plurality of different communication networks, and a hash code of trust related data that are used to evaluate trust values in the trust value list. The block can be shared within any of the different communication networks, for trust management on the at least one network node based on its trust value.