The invention provides a computer information privacy detection method based on a network. The computer information privacy detection method based on the network comprises the following steps. A network server terminal is linked with a computer client terminal. A network server terminal detection strategy is set up. A computer client detection strategy is confirmed. Dynamics of papers are monitored in real time with alarm. Modes of positive detection and passive detection are combined, all detection results are uniformly collected and analyzed and the computer client terminal is prompted to deal correspondingly. A white list which contains sensitive word information set by the computer client terminal is utilized to improve accuracy and search efficiency of privacy detection. Through unified setting and issuing of a privacy detection strategy of the network server terminal, real time monitoring and alarming of dynamics of the papers of the computer client terminal, automatic checking and an early warning mechanism are achieved. The working staff are more aware of secrecy and prevention by a technical method and leakage risks of an enterprise are avoided.