The third-party payment industries in China and in the United States are mainly composed of payment and settlement organizations, account-side payment institutions, acquirer-side payment institutions, and software and hardware suppliers. The industry scale effect is obvious, and oligopoly and even monopoly have appeared in some links of the industry. Due to the influence of regulatory policies and market maturity, the differences between the Chinese and American third-party payment industries in the account-side market and the acquiring-side market are particularly obvious. Technological innovation has promoted mobile payment to become the mainstream of the market. In 2019, the scales of mobile payment users in China and in the United States were 733 million and 64 million, and the market penetration rate is quite different. Oligopoly has already appeared in China's mobile payment in the account-side market, and Chinese market needs to rely on expanding scenario coverage and business innovation to drive development; the US mobile payment account-side market is slow to develop and is still in the expansion stage. In the acquiring-side market, small and medium-sized merchants with long-tail effects have become the focus of competition among Chinese and American acquiring-side payment institutions. It is the future trend to provide merchants with one-stop payment solutions around payment services. iiMedia Consulting analyst believes that in the wave of global digital development, the enabling role and value creation capabilities of payment institutions will be further improved, especially in the field of merchant services. Building a closed-loop service ecosystem around payment businesses has huge growth potential. The pioneers represented by Lakala and Square has broad prospects for development.