Abstract: A system, which can support the agent skill in real time when the agent, who does outside seals activity, has the meeting with the client. A browser 4(14) with proxy server includes a proxy module 2(12) and a browser module 1 (11) capable of receiving a content cache update event from the proxy module 2(12). The browser 4(14) with proxy server is set up in an operator computer 8 operated by a sales activity supporter, who is a specialist and in an agent computer 18 operated by a salesperson in a state remote from the operator computer in a high-speed and stable operating state, and synchronization is made between virtual browsers 4 and 14. The computers 8 and 18 provided with these browsers are exchangeable and connectable by a network 7, and the operator computer 8 is connected with a Web server 5 for acquiring update information so that an information copying system can be constituted.