The Vendors and Multiple Virtual Stores on Cooperative E-Commerce is integrated with the Cooperative Loan Servicing System, Stakeholders Management System, and Events Venue and Hostel Management System. The lack of provisions to offer other services on the side of the customers or buyers can result in less income, resulting in poor scalability of business growth for the grocery store. The researcher gathered data through a series of interviews and by providing questionnaires to the employees and members. Results showed a positive response from employees and members, with strongly Agreed-upon results regarding the system's System Usefulness, Information Quality, and Interface Quality. Using the Vendors and Multiple Virtual Stores on Cooperative ECommerce brought extra income to the Cooperative, which resulted in higher profit. At the same time, it provides convenience to customers by offering other services besides the existing old service, which can result in more customers and lead to higher profits and incomes. Background: A cooperative is an organization run by its members who share the benefits and profits, with productivity enhanced by integrating systems like E-commerce Multi-Store, Hostel Management, Stakeholders Management, and Loan Servicing, along with a Forecasting Model for sales trends. The Internet's evolution has transformed shopping styles, making online shopping increasingly popular and allowing consumers to shop without visiting physical stores. The Vendors and Multiple Virtual Stores on Cooperative E-Commerce aims to address operational issues, expand service reach, and generate additional income for the cooperative and its members by integrating the system into operations. Materials and Methods: The study presents an operational framework encompassing input, process, output, and outcome and emphasizes the use of the Software Development Life Cycle (SDLC) with a focus on prototyping for user feedback and refinement. Data from cooperative members and employees were gathered through interviews and questionnaires, leading to developing, testing, and validating modules for a Cooperative E-Commerce system. Results: The study involved 50 respondents, including 20 cooperative employees and 30 members. The evaluation of system usability through the Post-Study System Usability Questionnaire (PSSUQ) revealed that respondents strongly agreed on the system's usefulness (mean score: 1.29), information quality (mean score: 1.34), and interface quality (mean score: 1.28). High scores indicate that the system is easy to use, provides clear and helpful information, and has a user-friendly interface, contributing to efficient decision-making and competitive advantage for the organization. Conclusion: The integration of Vendors and Multiple Virtual Stores on the Cooperative E-Commerce platform significantly enhances cooperatives' operational efficiency, market reach, and overall business strategy, with respondents rating the system highly for usefulness, information quality, and interface quality