<p> 1. Introduction</p><p> The incidents on which this research was conducted featured the simultaneous dispatch of a doctor car (ambulance with doctor, departing from a doctor car station) and an emergency team (fire department, departing from a base hospital), who reported to the same emergency site in Funabashi City, Chiba Prefecture. We analyzed the operation data of the emergency medical network system featuring the pair dispatch. Furthermore, we established a visualization method for the planning area that will enable early treatment by proper arrangement of the complex, in cooperation with the hospital and the ambulance team, and verify its effectiveness.</p><p> 2. Methods</p><p> This study data group analyzed 27,087 dispatch cases from January 1, 2009 to December 31, 2009. The data were provided by the Funabashi firefighting station. Among the data, 428 pair dispatch cases were extracted for analysis.</p><p> 3. Results</p><p> ①Time before leading to the arrival to the hospital from the diagnosis with the independent fire department (in other words the time until therapy started) was an average of 38.32 minutes. When a pair dispatch method was used, the time from arrival at the site to the start of therapy was an average of 7.04 minutes.</p><p> ②In comparison with the sphere where doctor car was dispatched alone, it was based in the doctor car station and built the existence setting technique that could visualize the expanse of the sphere by the cooperation with each fire department.</p><p> ③Exhibited and evaluated the expanse of the sphere when the numbers of the doctor car stations increased to assume each emergency services would have a candidate point, and to inspect whether it was effective to place a doctor car station at several locations.</p><p> ④When there is a pair dispatch network with multiple ambulance teams (fire departments) in the vicinity of a doctor car base hospital, when compared with the case of five doctor car base hospitals without a pair dispatch network, the analysis result of the spread of the effective medical area in five minutes is, it was verified in this paper that using the pair dispatch network has an effective area spread of about 2.7 times or more than when the pair dispatch method is not used.</p><p> 4. Conclusions</p><p> By using the method of appropriate placement shown by the main subject, an earlier start to therapy was enabled by arranging for a doctor car in the pair dispatch system (in cooperation with emergency services). In addition, it reduced the distance between a hospital and the effective facilities by use of the visualization technique of the actual emergency site; this situation sphere was verified when I examined its position and inspected the effectiveness of the method.</p>