The present invention is a self-guided portable measuring device capable of measuring vitamin D, more specifically, a self-guided portable measuring device, the sensor module for measuring the user's living state, the concentration of vitamin D from the user's body state measured in the sensor module It characterized in that it comprises an analysis module, and a determination module for determining the degree of vitamin D in the user's body according to the concentration of vitamin D analyzed in the analysis module. In addition, the present invention relates to a measuring method using a self-guided portable measuring device capable of measuring vitamin D, and more specifically, as a measuring method using a self-directed portable measuring device, (1) a sensor module for measuring a user's living state Step, (2) the analysis module, analyzing the concentration of vitamin D from the user's physical state measured in the sensor module of (1), and (3) the determination module, the analysis module of step (2) According to the concentration of the vitamin D, comprising the step of determining the degree of vitamin D in vivo of the user characterized by its configuration. According to the present invention, a self-guided portable measuring device capable of measuring vitamin D and a measuring method using the same, a self-guided portable measuring device, a sensor module for measuring the user's living state, the vitamin from the user's physical state measured in the sensor module An analysis module for analyzing the concentration of D, and a determination module for determining the degree of vitamin D in the user's body according to the concentration of vitamin D analyzed in the analysis module, the sensor module is based on the body impedance of the user By measuring the status, the analysis module analyzes the concentration of vitamin D in the user's body using the correlation between the measured impedance and vitamin D, so that the user can easily determine the sta
