In order to improve the information and intelligent technology level of the national policy grain inventory, the portable grain inventory measurement equipment was developed by comprehensive application of modern technologies such as photoelectric detection, integrated circuit, software development, and mathematical modeling. On the basis of functional requirement analysis, the overall technical route of equipment research and development is formulated. The key problems and solutions such as high-precision measuring equipment and integrated control program, adaptive grain pile volume measurement scheme and algorithm and management software are focused. The application of equipment is briefly introduced. The equipment is advanced in technology, easy to carry, rich in functions and easy to operate. It provides a new measuring technology for the national grain clearance check.