Abstract: For the outpatient appointment decision problem in which patients′ preferences for service time periods and doctors are given， a decision-making method for outpatient appointment based on prospect theory was proposed. Firstly， loss matrix and revenue matrix were given based on patients′ preferences for doctors， and then the standardized property matrix for doctors was proposed according to prospect theory and matrix standardized method; similarly， loss matrix and revenue matrix were given based on patients′ preferences for service time periods， and then the standardized property matrix for service time periods was proposed; further，by establishing the integrated property matrix of patients served by doctors in each time period， an optimization model that aims for maximizing the sum of patients′ integrated property values was developed， and the appointment decision result could be obtained by solving the model. Finally， an example was given to illustrate the use of the proposed method.

Key words: outpatient appointment, preference ordering, prospect theory, reference point, optimization model