针对传统的增强现实系统在使用范围和可操作性等方面的局限性，首先介绍了一种基于移动便携设备的户外移动增强现实系统，并且分析了其主要的关键技术，然后重点阐述了该系统的体系构架和用于移动便携设备的3维图像渲染技术，通过北京圆明园部分场景的增强现实的实验结果表明，该移动增强现实系统不仅具有较强的实用性和可行性，并且还显示该移动增强现实技术具有广泛的应用前景和巨大的商业价值。

The paper presents the framework and key technique of a MAR system in allusion to the restriction in working range and operability of general MAR system. Then the author emphasize the framework and advantages in mobile application of Java3D which is an image rendering technique used in MAR system. Finally the feasibility of the MAR system in the paper is validated with experiments. Moreover, the wide area application perspective and its potential commercial value are also expected.