A single-piece inclination monitoring device comprises a post, the bottom of the post is provided with an inclination sensor, and the top of the post is provided with a data acquisition terminal. The inclination sensor and the data acquisition terminal are electrically connected and communicate with each other and exchange data. The power supply of the device in the absence of mains power can be provided by the self-contained solar panel and storage lithium battery, which reduces the difficulty of wiring and installation, increases safety, and saves time and cost.