Having discussed the principles to establish a semantic categorical system in Chinese, the author identifies the following three principles: 1) Coal-driven or pragmatic principle; 2) The Principle of proof-test through linguistic forms; and 3) The principle of computability. The author also attempts to clang that relativity is one of the important characteristics of semantic categories. Linguists should attach more importance to the relativity of semantic categories than to disputes over irrelevant questions.