With the development of College English teaching, colleges and universities have trained a large number of compound talents who understand foreign languages. At the same time, with the development, there are many problems in some aspects of English teaching. Nowadays, the teaching guiding concept overemphasizes the study of language foundation, grammar, sentence structure, etc., but neglects the training of students' practical ability of using language, which embodies a strong color of exam oriented education. This paper explores the combination of the online answering system and College English teaching, and puts forward the design and implementation of the online answering system in order to improve the quality and effect of English teaching. At present, the only standard to measure the quality of College English Teaching in China is generally the CET-4 and CET-6. In this way, the means of assessment and test for teaching is very single. In our country, this kind of test mostly follows the design of foreign related tests and the aspects involved in them. This kind of test mode obviously does not meet our needs for English talents. As for the students' language ability, it can't be detected completely only through the examination. In this way, this single test mode also brings some negative effects to the English teaching work and the design of teaching to a certain extent. Therefore, in view of the existing problems, further improvement and innovation can be made in the future college English teaching. Teachers can scientifically use multimedia, Internet and other information technology means to reform the traditional classroom teaching methods. Because, in the traditional teaching process, the amount of information that students receive is very small, and the way that they can choose to receive is very single, which leads to the low interest of students in learning and the low efficiency of teachers' teaching. With the continuous application of various science and technology as well as various network resources in the teaching field, computer network assisted English teaching has become an important teaching mode. We can see that with the rapid development of science and technology today, the existence of online classroom answering system can better connect teaching, teachers and students, and can mobilize the initiative and enthusiasm of students, so that college English teaching in higher vocational colleges can embark on the road of sustainable development.