Abstract: The invention concerns a method (20) for measuring and analysing activity on at least packet data communication network (30), [for example a communication network based on the TCP/IP protocol] of a plurality of terminals (10), using means for collecting data and equipment comprising a database for storing collected data. Said method comprises a step which consists in acquiring and analysing data concerning data exchanged over the communications network by said terminals, said data comprising at least descriptive data of each packet transmitted and received by each terminal, a step which consists in transmitting said collected data to the central equipment subsequent to analysis of the collected data and generating aggregate databases to supply data representing the activity of a panel of equipment items connected to the communications network.