Abstract: Embodiments of the present disclosure disclose a measuring device of zenith angle, which relates to the technical field of angle measurement and is used to measure solar zenith angle. A light receiving member includes solar panels, a support frame with a regular pyramid structure, and a first counterweight member. Light intensity processing circuits are electrically connected to the solar panels and determine a rotation angle of the support frame based on intensity of light received by each solar panel; a direction adjusting member is electrically connected to the light intensity processing circuits to adjust angles of the support frame in both vertical direction and horizontal direction. The embodiments of the present disclosure have a simple structure, and can avoid limitations on placement angles of the device, measure a zenith angle quickly and accurately, reduce measurement costs, and be made into a small-sized device to facilitate outdoor carrying.