The purpose of this study was to develop the computerized nursing diagnoses system for clinical application and activation of nursing diagnosis based on validity verification. In addition, our research team also performed system tests in clinical situations, to identify ways to improve the program and make it more practical. Nursing Diagnoses System will increase nurses' knowledge and experience of the application of nursing diagnoses in clinical situations and development of nursing interventions by nurses as well as the effectiveness of hospital computerized systems. We expect this system can contribute to an improvement in the quality of nursing care. Also we will continuously evaluate and revise the system related to the utilization of the program.