A measuring device comprising: a relative humidity measurement element; a heating element for heating the relative humidity measurement element; a temperature measurement element; and a microcomputer, wherein the microcomputer is configured to calculate specific humidity on the basis of relative humidity information and temperature information output from the relative humidity measurement element and to control an amount of heat generation of the heating element by performing heating using the heating element or stopping the heating so as to radiate heat, and to control an environment to be measured to a temperature set on the basis of a detection characteristic of the relative humidity measurement element and a detection characteristic of the temperature measurement element, characterized in that the microcomputer is configured to receive a heating amount of the relative humidity measurement element from the heating element and further elements, including a microcontroller arranged in the vicinity of the relative humidity measurement element on the basis of a drive state of the heating element and a drive state of the further elements, wherein the heating amount is based on a drive state of the relative humidity measurement element, and to calculate a temperature control amount with respect to the calculated heating amount, to adapt the temperature control amount to reduce a specific humidity error after the temperature is controlled on the basis of the temperature obtained in a previous step for temperature measurement and the relative humidity obtained in a previous step for relative humidity measurement, so that heating amount is controlled on the basis of the temperature control amount, wherein the humidity measuring element and the associated further elements are arranged on a circuit board. a relative humidity measurement element; a heating element for heating the relative humidity measurement element; a temperature measurement element; and a microcomputer, wherein the microcomputer is configured to calculate specific humidity on the basis of relative humidity information and temperature information output from the relative humidity measurement element and to control an amount of heat generation of the heating element by performing heating using the heating element or stopping the heating so as to radiate heat, and to control an environment to be measured to a temperature set on the basis of a detection characteristic of the relative humidity measurement element and a detection characteristic of the temperature measurement element, characterized in that the microcomputer is configured to receive a heating amount of the relative humidity measurement element from the heating element and further elements, including a microcontroller arranged in the vicinity of the relative humidity measurement element on the basis of a drive state of the heating element and a drive state of the further elements, wherein the heating amount is based on a drive state of the relative humidity measurement element, and to calculate a temperature control amount with respect to the calculated heating amount, to adapt the temperature control amount to reduce a specific humidity error after the temperature is controlled on the basis of the temperature obtained in a previous step for temperature measurement and the relative humidity obtained in a previous step for relative humidity measurement, so that heating amount is controlled on the basis of the temperature control amount, wherein the humidity measuring element and the associated further elements are arranged on a circuit board.