O2O model has extensive development space and great potential. This paper studies the online booking behavior of consumers on behalf of the online booking service in the tourism industry. In view of the characteristics of the website, this paper explores consumers’ willingness to book rooms online, in order to put forward substantive suggestions for the development of the Internet industry, and also to find more valuable business models for other emerging industries. This paper uses theory of reasoned action as the infrastructure to construct a relationship model with trust as a mediator, including six factors (perceived scale, reputation, trust, attitude, perceived interest, online booking willingness), and proposes 7 assumptions. This paper verifies the interaction between various factors through empirical research. The six assumptions are true and present varying degrees of impact, but the assumption between perceived benefits and online booking intention is not supported. This study provides effective and feasible management advice for managers to attract consumers to make online reservations. It also provides a theoretical basis for the academic community to explore the impact of consumer trust on different types of websites in the future.