A gait evaluation system, comprising: a quantitative measurement value acquirer (40, 80) that acquires a measurement value of a quantitative parameter indicating an amount of walking, measured by a measurement device worn by a subject; a qualitative measurement value acquirer that acquires at least measurement values of a stride length, of an arm swing angle and a cadence as qualitative parameters indicating a walking form, measured by a measurement device worn by the subject; a quantitative result determination unit that determines an evaluation result regarding an amount of walking, based on a measurement value of the quantitative parameter; a qualitative result determination unit that determines an evaluation result regarding a walking form, based on a predetermined evaluation model that reflects the degree of approximation to a form tendency with which a walking exercise effect is likely to be achieved, and measurement values of the qualitative parameters; and an output unit that outputs walking result information including the evaluation result regarding the amount of walking and the evaluation result regarding the walking form, wherein the qualitative result determination unit determines the evaluation result regarding the walking form using, as the predetermined evaluation model, an evaluation formula for obtaining the sum of a value obtained by adding a weight to the ratio of the subject's stride-height ratio to an average stride-height ratio of a corresponding attributed level, and a value of the ratio of the subject's cadence to an average cadence of the corresponding attributed level, and an evaluation formula that is set such that a weight is added at least to a measurement value of the arm swing angle. a quantitative measurement value acquirer (40, 80) that acquires a measurement value of a quantitative parameter indicating an amount of walking, measured by a measurement device worn by a subject; a qualitative measurement value acquirer that acquires at least measurement values of a stride length, of an arm swing angle and a cadence as qualitative parameters indicating a walking form, measured by a measurement device worn by the subject; a quantitative result determination unit that determines an evaluation result regarding an amount of walking, based on a measurement value of the quantitative parameter; a qualitative result determination unit that determines an evaluation result regarding a walking form, based on a predetermined evaluation model that reflects the degree of approximation to a form tendency with which a walking exercise effect is likely to be achieved, and measurement values of the qualitative parameters; and an output unit that outputs walking result information including the evaluation result regarding the amount of walking and the evaluation result regarding the walking form, wherein the qualitative result determination unit determines the evaluation result regarding the walking form using, as the predetermined evaluation model, an evaluation formula for obtaining the sum of a value obtained by adding a weight to the ratio of the subject's stride-height ratio to an average stride-height ratio of a corresponding attributed level, and a value of the ratio of the subject's cadence to an average cadence of the corresponding attributed level, and an evaluation formula that is set such that a weight is added at least to a measurement value of the arm swing angle.