This study is intended to provide a comprehensive model for the formation and deployment of employees’ performance improvement through meta-synthesis approach. This is an applied research following meta-synthesis method. The researcher has conducted a deep and in-depth investigation on the subject using the meta-synthesis method, and synthesized the findings of relevant qualitative researches. In this regard, 289 qualitative researches regarding employees’ performance were reviewed, from which 91 researches were selected. Then, dimensions and codes were identified through content analysis, and their significance and priority were determined using Shannon entropy. Research results indicated that the codes of employee development, employee training, job opportunities, organizational strategies and managerial skills, gained the highest importance among four dimensions of improvement of employee performance. Finally, having completed all research phases, the researchers presented a comprehensive model in three stages: identification, administration structure, and designing of a supportive program for improving employee performance.