Abstract: There are three ways to define employment matching:horizontal & vertical matching, superficial & actual matching, and short-term & long-term matching. This paper discusses three different measurements of employment matching:self-assessment, post analysis and statistical measurement. These three kinds of measurements each has advantages and disadvantages and they are used in combination in all kinds of researches. Then, this paper reviews the influencing factors of employment matching:individual demographic characteristics, employers' preference and post characteristics, education system and labor market conditions. Through analysis and investigation of the relations between employment mismatch and factors including wages, job satisfaction, employee turnover rate, participation rate of on-the-job training, this paper finds out that employment mismatch has a negative effect on labor market.