The relationship between language testing and language teaching is said to be inseparably interconnected and act together.Language testing has been unceasingly improving itself responding to the requirements of language teaching so as to improve testees’language ability.From the prescientific movement to the now newest communicative movement,four main approaches to testing have its pros and cons in achieving the reliability and validity of testing.By them,we can see communicative approach is of necessity to become the milestone of language testing The relationship between language testing and language teaching is said to be inseparably interconnected and act together. Language testing has been unceasingly improving itself responding to the requirements of language teaching so as to improve testees’language ability. Flash the prescientific movement to the now newest communicative movement, four main approaches to testing have its pros and cons in achieving the reliability and validity of testing.By them, we can see communicative approach is of necessity to become the milestone of language testing