Remote monitoring system

In a remote monitoring system which a plurality of imaging devices for imaging objects, a plurality of terminal devices provided with display parts for displaying as image data that the objects imaged by said imaging devices, and center device for controlling said imaging devices are connected through electronic communications circuits that support two-way communications;

• the improvement comprising:
• said imaging device having first image data outputting means for outputting first image data obtained by imaging said object to said center device;
• and
• said center device having first registration means for registering user identification information, storage means for storing the display size of said display part for each model of said terminal device, discriminating means for discriminating the model based on information transmitted from said terminal device, image data converting means for reading out through said storage means the display size compatible with the model information obtained through said model discrimination, and for converting the data size of said first image data into second image data compatible with said display size, and second image data output means for outputting said second image data to a specific terminal device associated with said identification information.