It is well known that the problem of finity and infinity is the basic problem of mathematics, and it is also the basic problem of Philosophy. Based on the infinite view of dialectical materialism, this paper makes a detailed analysis and comments on infinite thoughts of various schools, and further clarifies the development course of infinite thoughts in order to contribute to the healthy development of basic mathematics. At the same time, the author puts forward the Infinite Exchange Paradox, which strongly questions the idea of actual infinity in Hilbert Hotel Problem.