中文摘要：

战争与天气密切相关。抗日战争期间，美国为了准确掌握太平洋的气象、水文等情报，打击日本的军事力量，开始与中国进行全方位的军事合作，气象情报合作是最重要的内容。1943年4月15日，中美双方在华盛顿正式签订了《中关特种技术合作协定》，美国在中国先后成立中关特种技术合作所和美军观察组，分别在重庆和延安培训中国气象人员，为美国空军和海军攻击日本军队、空袭日本本土提供气象情报。美国与国共两党在气象台设立、气象情报网建构、气象人才培养等方面开展合作，中美气象人员提供的气象情报，在抗日战争中发挥了重要作用。

英文摘要：

Sino-American Special Technical Cooperative Organization （SACO） and United States Army Observation Group （USAOG） were founded in China by USA during the WWII and Chinese weathermen were trained in Chongqing and Yan＇an respectively in order to provide weather information for the U.S. air force and navy to bomb the Japanese army and Japan territory. The Sino-American cooperation proved to be very success- ful and made great contributions to the victory of the war and the Chinese meteorology in meteorological instru- ments, talented weathermen and weather stations. However, the international meteorological cooperation was lit- tle known due to the long-term confrontation between China and the United States, and between the Taiwan straits after 1949. This paper tries to make an objective description to the cooperation and to restore the histori- cal truth.