This study aims to integrate blockchain technology into agricultural systems to establish an open crop environment monitoring system. The advancement of smart agriculture systems contributes to improving productivity and quality; however, centralized data management and distrust can lead to issues with data integrity. To address these concerns, we propose a monitoring system that utilizes blockchain smart contracts to ensure the transparency and integrity of crop environment data, thereby resolving issues of distrust in data management. This system will enhance trust in crop data and contribute to the digital transformation of agriculture, increasing the efficiency of the production process.