English proficiency test is one of the most authoritative types of language competence test, which can measure English competence of test-takers accurately. The validity and reliability of English proficiency test are relatively authoritative. The results of test are the authentic representation of test-takers’ level. Since English are spread and used widely all over the world, different kinds of English proficiency tests appear rapidly. Recently, College English Test (CET), Test of English as a Foreign Language (TOEFL) and International English Language Testing System (IELTS) are representative sample for English proficiency test in China. This dissertation compares CET with TOEFL and IELTS by summarizing their test forms and contents in listening, reading, writing and speaking, and analyzes features and purposes of CET, TOEFL and IELTS. According to the systemic analysis, this dissertation brings up the proper attitude that test-takers should hold for English proficiency test. Meanwhile, the author proposes some effective methods of English study for English proficiency test. The author also makes some rational suggestions for developing college English teaching method and modes of instruction.