In this study on Genetic Algorithms（GAs）

Symmetric Code theory is developed.We define two kinds of Symmetric Codes

Symmetric Code Strings and their operative rules.Then the propertis of Symmetric Codes are given out. From the Symmetric Code theory

our Genetic Algorithm with Symmetric Codes（GASC） is proposed. In GASC

the following special techniques are used for the first time: Symmetric Codes

Good Members Protection

Hopeful Members Immigration and Partial Genetic Reservation etc. This genetic technigue can be applied to some system control

such as robot system. The simulation on its applications shows that Genetic Algorithm with Symmetric Codes can much overperforms general genetic algorithms and that Coding technique has important influence on genetic algorithms[7

8]. But this problem has been ignored before. Considered as a general-purpose search

optimization technique

GASC can also find its application in the areas of machine learning

neural network learning and problem resolution.