This paper suggests Enode Operating Systems that is core part of active network. It iscomposed of five parts: domain, channel, thread, memory and file module. The domain and channel module among five parts are the main function. The remaining parts that are the thread, memory, and file are the supporting module for the domain and channel. The domain module manages active network It creates and deletes domain data structure. The channel module has an inchan, outchan, and cutchan. We also test the Enode Operating Systems to verify suggesting concept of node Operating System