Although ubiquitous learning is a novel and creative teaching approach, two key issues inhibit its success overall: a lack of appropriate learning strategies regarding learning objectives, and ineffective learning tools for receiving knowledge regarding the chosen subjects. To address these issues, we develops and designs a game-based educational app and an object-linked knowledge environment in order to help learners learn about Taiwan's Austronesian culture. 70 fifth-grade students are split into experimental and control groups to determine whether there are significant learning differences. For the experimental group, we use a questionnaire survey to assess students' learning condition and to measure their willingness to continue to use this app. The questionnaire examines mobile learning from the perspectives of service quality, hedonic value,and certain control variables. Service quality reliability is found to be the key factor driving learners' willingness to use the system. The perception of hedonic value also has significant influence on learners' willingness. The control variable of subjective norm is found to be beneficial in encouraging learners to use the system, thus affecting and increasing learners' willingness. We conclude that in an outdoor object-linked knowledge environment, students learn more effectively when the activities involve the use of an educational app.