Abstract: In order to analyze the main factors comprehensively that impact on modern brand agriculture growth by a scientific approach, reveal its growth patterns and predict its developing trend, the author diagnosed key drivers of brand agriculture growth by analyzing the process of production, marketing and consumption of modern brand agriculture and constructed a Brand Agriculture Growth Dynamics Model (BAGDM) based on the microeconomics equations and system dynamics modeling approaches. Applying the BAGDM, the author implemented a case study to predict the growth ability indicators change of Yantai apple and pointed out the key drivers of the growth of Yantai apple brand. The research results indicated that the BAGDM owned the abilities to meet the challenge of explaining and analyzing the dynamics mechanism of brand agriculture growth. And in the future 20 years, the growth of Yantai apple mainly will lie in the increases of sales revenue and profit and the core drivers of the growth of Yantai apple will be the maintenance, extension and innovation of its brand.