An optical-transmission head-mounted display system offers several advantages, including hands-free operation, continuous functionality under diverse conditions, and 24/7 usability, making it suitable for diverse applications. This study presents a head-mounted display device that uses a free-form prism optical transmissive display method and integrates multispectral sensors within an embedded architecture. We developed an optical display module with a large field of view, high resolution, exceptional light efficiency, low power consumption, and visual adaptability. This was achieved using a domestically manufactured Rockchip 3399 platform and a robust R&D architecture. By optimizing the multispectral sensor quality and parameters, we developed infrared, low-light, and visible-light sensors, along with MicroOLED drivers for the microimage source, resulting in a fully integrated system. Based on the native system, we developed an application that enables seamless switching between multispectral images, thereby achieving an integrated multispectral image display. As a next-generation wearable computing terminal with a high degree of localization, the proposed system demonstrates great promise for applications in park security, industrial inspection, epidemic prevention, temperature monitoring, and multidimensional perception.