We have developed a system for sales staff to access database systems which contain the information on customers and travel plans through mobile terminals such as a notebook PC from their location by applying the mobile agent technology. We measured the quantity of transferred data and response time required for the agent to move. Although it takes a comparatively long time for the first retrieval, it is still about 10-15 seconds at the transmission rate of about 28.8kb/s. After the first retrieval, only data is transmitted, so the communication time is nearly equal to the time for data transmission.