Considering the action of aeronautical maintenance as the system of " man-machine-environment" , and the behavior deviation of maintainers as the essence of maintenance errors , this paper provides the definition of aeronautical maintenance errors.

Based on the new understanding of“investor behavior”, the paper mainly utilizes elementary theories of modern behavior finance and the analytic methods based on them to probe into several elementary theories of investors’psychological factors and behavior deviation as well as their rational degree.

It studies the investor s psychology factor under uncertainty condition and the influence on market price that is caused by behavioral bias.

The paper facilitates taking precautions against the administrator\'s behavioral bias,further improves quality and efficiency of company\'s business decision.

We point out that the manipulator could benefit from the investor s behavior biases such as representative biases and dispositional effect,at the same time,the manipulator could impute manipulation costs to the behavior-driven investors.

This paper aims to analyze the phenomenon of increasing deviation behaviors of juvenile.