Cambridge International English Certification is a graded test specially developed and designed by Cambridge Assessment English for English learners at all stages. According to the difficulty of the test questions, it is divided into A2 Key, B1 Preliminary, B2 First, and C1 Advanced and C2 Proficiency have five levels, including four complete assessments of listening, speaking, reading, and writing, aiming to comprehensively evaluate the English ability of non-English-speaking candidates in listening, speaking, reading, and writing.

The content of the test covers academic and various industry topics, and the evaluation content is designed with reference to the needs of the international market; the test results are popular all over the world and are widely used by schools and institutions in many countries.

In addition to self-assessment of English learning results and encouragement of English learning, the results can also be used as a standard for studying abroad or evaluating employees' English ability.