This paper introduces Qian Xuesen´s view on geographical science. In modern human knowledge system which consists of eleven departments Qian takes geographical science as the “bridge science”or confluence science between natural science and social science. Among the five open complex giant systems Qian put geographical system between the galaxy system and social system. In the system structure of socialism construction ,which is proposed by Qian, he places geographical construction side by side with constructions of political, spiritual and material civilization. Showing great foresight and highly mastering of Marxist philosophy of dialectical materialism Qian puts forward the idea that geographical science should be developed from the old discipline of geography so that it can serve the development of national economy well. Some studies done by the authors organization, which may corroborate each other with Qian´s view on geographical science, are introduced in the paper. They include the following aspects： 1) Geographical science is an anastomosis of geography, ecosystem, environment and geographical information system; 2) The space and geographical information network system is an open complex giant system; 3) In geographical information models, deduction, induction and analogy logic are used to build geographical non-linear complexity equations; 4) Geographical information equations can forecast geographical phenomena that will be of service to geographical system engineering; 5) About philosophy of geographical science.