The present disclosure relates to a method and apparatus for diagnosing urinary disturbances by simultaneously measuring a urinary flow rate and residual urine. The method for diagnosing urinary disturbances according to the present disclosure includes obtaining at least one ultrasonic image of a bladder for each unit time from a patient who is urinating, obtaining at least one urine region image for each unit time from the at least one ultrasonic image for each unit time, calculating at least one estimated urine volume for each unit time based on an area of the at least one urine region image for each unit time, calculating at least one parameter value with respect to urinary disturbances based on the at least one estimated urine volume for each unit time, and outputting the at least one parameter value.