A network system comprises: a terminal(s) that is connectable to a sensor(s), converts data collected by the sensor(s) into second data by performing predetermined processing on the collected data, and transmits the second data to the predetermined apparatus(es) arranged in a physical network(s); the physical network(s) that includes the predetermined apparatus(es); and a control apparatus that controls a virtual network(s) established between the terminal(s) and the predetermined apparatus(es) so that the second data transmitted from the terminal(s) reaches the predetermined apparatus(es).