Displaying device, displaying system and displaying method for number of roaming users

The present invention provides a device, system and method for characterizing the number of roaming users. The device includes: a data collection unit, a data collection unit, a database and a graphic presentation unit, wherein the data collection unit is used to extract the registration information of roaming mobile communication devices. Information; a data summary unit, used to poll the information list in the database; the database, used to set the information list and the time summary list of each granularity, receive the registration information of the roaming mobile communication device, and fill in the registration information of the roaming mobile communication device Enter the information list; receive the polling result, fill in the polling result into the corresponding time summary list; the graphic display unit is used to set the electronic map, in the electronic map, establish the corresponding relationship between each region and the number of roaming, when When a trigger for a target area is received, the roaming number corresponding to the target area is directly displayed. This scheme can represent the number of roaming users more intuitively.