The invention discloses a data delay method and system based on network live broadcast room statistic information and relates to the field of network data control. The method comprises the steps that a server side obtains the number of users of a network live broadcast room and obtains a room ID of the network live broadcast room when the number of the users of the network live broadcast room is greater than a popularity threshold; when it is monitored that a client side logs in, the server side stops loading user entering information to the network live broadcast room corresponding to the room ID; the server side carries out delay identification on a user ID of the client side; and when the client side attached with the delay identification makes a request for obtaining live broadcast data of the network live broadcast room, the server side transmits second-level cached live broadcast data to the client side. According to the method and the system, loads of the server side are clearly reduced, and the working quality and working efficiency of the server side are greatly improved.