To prevent kindergarten teacher's resignation due to workplace stress, and to maintain better education, we established the stress evaluation method based on the measurement of the autonomic nervous system's activity (ANSA) by M-BIT, and we applied it to evaluate and decrease workplace stress. We proposed the method of detecting the subject with large stress and remains stress by the distribution of epoch values of sympathetic nervous system's activity (SNSA) during awake and sleep,

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... . We also proposed the method to evaluate the degree of chronic unhealthy of ANSA, normal, incoordination of ANSA or depressed state based on epoch values of coefficients of variation of RR intervals (CVRR) during awake, and co-use of Self-Rating Scale increases the accuracy of evaluation. Furthermore, we proposed that status of ANSA, normal, incoordination of ANSA and depressed state can be evaluated by the CVRR and SNSA values measured by 120 seconds stress application measurement. We found that the chronic continuation of large SNSA does not always lead to chronic unhealthy state of ANSA. Hence, we proposed two dimensional evaluation of SNSA with CVRR, and separation of stress to passive stress and active stress.