In this paper, evaluation of emergency care service framework is developed to study network reliability using I.A method. Analyzing the present condition of an emergency business, in this study we examine the optimal location of fire stations and first-aid station. We propose an accessibility indicator of the travel time reliability to the urgent medical institution of an ambulance. In this paper, the above method is applied to Nagano urban area. In the experimental study, we verified location of fire stations and first-aid station affects a limit time to life-saving. We confirmed accessibility indicator practicality.