In Cyber Security Law，three parties are involved，the state，network operators and net users. Among them，network operator plays the most important role. In the system constructed by Cyber Security Law，network operators are not only market players，but also bear important regulatory functions. Network operators’ obligations as regulators and market players may conflict with each other，which may put network operators into a dilemma. This paper analyzes the reasons and consequences of the confliction of network operators’ dual responsibilities，and points out that the industry association of network should play important role in the co-regulation system and developing process of network.