A method for realizing a central monitoring server by using an individual patient monitor device is provided, and the patient monitor device (301) can monitor the patient's physiological parameter and simultaneously can collect and process the data from the other monitor devices through wired or wireless LAN (Local area network). The running state and the patient's information of the other monitors can be looked over on this monitor (301). The monitor (301) can display this monitoring measurement information and simultaneously display all the patients' information of the other monitors which are networked with it, and the other networked monitors can also be controlled by this monitor (301). The monitor (301) can use a single-screen or multi-screen display, and the displaying content can be the same or not.