To provide a water pressure and flow rate data display system for easily grasping time variations in water pressure or flow rate data at each point and easily comparing water pressure or flow rate data at a number of points.

The water pressure and flow rate data display system 1 comprises a data creating means 2 for time series display for processing measurement data A of water pressure or flow rate for creating data B for time series display, a database 3 for time series display for storing the data B for time series display, and a water pressure and flow rate data display means 4 for acquiring the data B for time series display from the database 3 for time series display for displaying the data B for time series display on a map by a geographical information system (GIS).