With the coming of knowledge economy era, the role of knowledgeworkers in the enterprise development is becoming more and more important in scientific and technological knowledge and innovation ability,they have often is the focus of attention and the competition between enterprises. But behind the knowledge staff is the competition of company of the system and the system of competition. Enterprise performance evaluation system plays an important role in the retention, attract and stimulate talents. Although managers more attention to knowledge typeemployees more and, but research in enterprise knowledge workers performance appraisal system is few, most of the characteristics ofperformance management idea and appraisal method and the existing knowledge type employees have a conflict, and can not be directly applied to knowledge type employee performance management and appraisal.Therefore, if the traditional performance management and appraisal system, not only can not accurately reflect the performance of knowledge workers, but also makes the knowledge type staff of the enterprisemanagement ability and fairness of the doubt, decreased work enthusiasmand organizational loyalty, which is the development of enterprises a smooth for a long time will produce adverse effect. Therefore, it is necessary to study the enterprise especially for high-tech enterprises in the knowledge type employee performance and its evaluation system.