The web-Based Hospital Vaccination Information Monitoring System represents a significant advancement in managing and overseeing vaccination processes within healthcare facilities. By employing Internet of Things (IoT) technology, this system enables hospitals to monitor vaccination data in real time, ensuring that all stakeholders including patients, healthcare providers, and administrative staff have access to accurate and timely information. This integration of IoT devices, such as sensors for tracking vaccine inventory and patient data, automates the process of data collection and transmission, which helps reduce manual errors and improve operational efficiency. The primary objectives of the system include real time tracking of vaccination statuses and inventory levels, reducing the incidence of manual entry errors, enhancing process efficiency, and providing support for data-driven decision-making. The system is designed to address common challenges in vaccination management, such as inaccuracies in data entry, delays in updating vaccination records, and inefficiencies in inventory management. By automating these processes, the system ensures that data is updated immediately, allowing for swift responses to changes in vaccination needs and resource availability. The methodology for developing this system involves setting up and configuring IoT devices equipped with sensors, programming these devices using the Arduino IDE, and integrating the collected data with existing hospital management software. This approach ensures that vaccination data is seamlessly transmitted and accessible for real-time monitoring. Extensive testing and calibration of the sensors are conducted to verify accuracy and reliability. The findings from implementing the system highlight substantial improvements in data accuracy, efficiency in managing vaccination inventories, and overall process management. The use of Arduino IDE in the system development contributes to a cost effective and scalable solution, making it a valuable tool for enhancing the management of vaccination processes in hospitals. Overall, the IoT-Based Hospital Vaccination Information Monitoring System significantly improves operational efficiency, supports better decision making, and ensures more reliable patient care through enhanced data accuracy and real time monitor. We anticipate that the implementation of the IoT-Based Hospital Vaccination Information Monitoring System will lead to significant improvements in several key areas. Specifically, we expect to observe a marked increase in data accuracy, with real-time updates minimizing manual entry errors and discrepancies. Inventory management is expected to become more efficient, with automated tracking of vaccine supplies reducing the incidence of stockouts and overstocking. Additionally, the system is projected to enhance overall operational efficiency by streamlining vaccination processes and improving response times to inventory needs. The integration with hospital management software is anticipated to facilitate better data-driven decision-making, allowing healthcare providers to allocate resources more effectively and promptly address vaccination requirements. Furthermore, the system’s scalability and cost-effectiveness, due to the use of Arduino IDE, are expected to make it a practical and sustainable solution for hospitals seeking to improve their vaccination management practices.