Field device management system

A field device management system comprising:

• a plurality of field devices equipped in a plant;
• one or more host devices equipped at a place distant from the plant and configured to connect to the field devices via a first network;
• and a terminal apparatus configured to connect to the field devices via a second network and to connect to the host devices via a third network,
• wherein the terminal apparatus comprises:
• a first communication interface module configured to perform field communication with the field devices via the second network,
• a second communication interface module configured to perform near field communication with the host devices via the third network, and
• a controller that, when updating data of any one of the field devices, performs communication with the host devices through the second communication interface module, receives update permission information from the host device through the second communication interface module and performs data update of the field device through the first communication interface module.