Collaborative Search provides a collaborative space in Internet and allows people to solve their search problems to complete their group works. People can learn from each other and guide less experienced members through their searches. In this study, we aimed to explore learners' attitudes toward collaborative search systems. We developed a questionnaire based on Three-Tier Use Model (3-TUM) for evaluating learners' attitudes toward collaborative search systems. We conducted that five attitude factors (system functions, system satisfaction, collaborative activities, users' attitudes, and system acceptance) should be examined at the same time when building a collaborative search system. The results also provide an acceptance model for understanding learners' behavioral intention of facilitating collaborative search systems.