Abstract: In the traditional process of set operations, the elements of set arc usually represented through natural lan- guage rather than formalized representation,and current representation has affected the efficiency of set operations. In order to solve this problem and improve the efficiency of set operations, this paper innovatively introduced the binary in- to the process of set operations, proposed the concept of "Set Attribute Code" , and defined a series of operation rules a- bout "Set Attribute Code". All the above formed a relatively complete and formal computing system of "Set Attribute Code". Based on above theory of "Set Attribute Code"，this paper proposed a series of related algorithms, which demon- strated the correctness of the theory of "Set Attribute Code". Experimental results show that the process of set opera- lions can be achieved through 0，1 operation in the theory of "Set Attribute Code" and related algorithms. And the tar- get of query operation was successfully achieved,which is very important in the database through the mechanism of "Set Attribute Code".

Key words: Set attribute code, Set operations, Binary, Algorithm, Database, Query