The present invention relates to a calorie- and time-accumulative control method of nutrient supply to agricultural crops by using sunlight, which comprises: a setting step for setting a total accumulated calories of sunlight and a time needed for calories accumulation sufficient to optimize growth of agricultural crops planted in a greenhouse or a vinyl greenhouse and then making water and nutrients supplied to agricultural crops according to a set level of calories and time a sensing step for sensing the amount of sunlight emitted to the agricultural crops via a sensor installed at a greenhouse or a vinyl greenhouse to convert the amount of sunlight into calories and a supplying step for making water and nutrients supplied to agricultural crops when the sunlight is accumulated and emitted to agricultural crops to reach the level of calories set by a user after the sensing step. According to the present invention, an amount of sunlight emitted to agricultural crops is converted into calories as calories are accumulated until the level set by a user, water and nutrients are supplied to the agricultural crops only when both an accumulated amount of calories of sunlight and an accumulated time reaches predetermined levels, thereby preventing excessive operation of an apparatus for supplying water and nutrients to agricultural crops, allowing only a predetermined amount of water and nutrients to be supplied to agricultural crops through the data necessary for growth of agricultural crops to contribute to growth of agricultural crops and obtain precise data on agricultural crops.COPYRIGHT KIPO 2015본 발명은 태양광을 이용한 열량과 시간 누적식 농작물의 영양분 공급제어방법에 관한 것으로, 온실이나 비닐하우스에 심어진 농작물이 최적으로 성장할 수 있는 빛의 총 누적 열량과 빛의 열량이 누적되는 시간을 설정하면서 설정된 열량과 시간에 따라 농작물로 수분과 영양분을 공급할 수 있도록 하는 설정단계와, 온실이나 비닐하우스에 설치된 센서를 통해 태양에서 농작물로 발산되는 빛의 광량을 감지한 후, 빛의 광량을 열량으로 변환하는 감지단계와, 상기 감지단계 이후, 태양의 빛이 누적되면서 농작물로 발산되어 사용자가 설정한 열량의 수치가 이루어지면 농작물로 수분과 영양분이 공급되는 공급단계로 이루어진다.본 발명은 태양에서 농작물로 전해지는 빛의 수치를 열량으로 연산하여 사용자가 설정
