Based on the performance of max power output from solar panel, through computation the maximum power output can be achieved, which is called the tracing method for max power point of solar energy. In this essay, it introduces some basic methods for tracing the max power point. After analyzing merits and demerits of each method, we chose disturbance observation method for research, and further we put forward the improved disturbance observation method. As the result, the control system is in stable operation, and avoids rapid oscillation.% 太阳能电池板所发电能有最大功率输出特性，根据这一特性通过计算法可实现最大功率的输出，这就是太阳能最大功率点的跟踪。本文介绍了最大功率点跟踪的基本方法，在分析了各自优缺点后，选择了扰动观察法，提出改进的扰动观测法算法。结果表明研究的控制系统运行稳定，避免了快速振荡现象的出现。
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