1. A method of evaluating an exercise capability, using one or more processors, the method comprising: monitoring a heart rate of a user using a sensor of a wearable device; using a mobile device communicating with the wearable device, setting a detection area of a range of heart rates to measure an exercise capability of the user based on the monitoring and body information of the user; and detecting a feature point based on a mathematical function of heart rates in intervals within the detection area for evaluating the exercise capability from the detection area.