Objective]To study Professor Wang Kungen's therapeutic principles in treating functional dyspepsia by data mining therapy. [Method]First, establish Wang Kungen's medical records database;then do data standardization and data mining.[Result]There are total y 408 cases that meet the demand. Postprandial distress syndrome is the major subtype of senile group while epigastric pain syndrome is the major subtype of non senile group. The major patterns of syndrome of FD in Professor Wang Kungen's medical records are as fol ows: liver qi attacking the stomach, deficiency and stagnation of spleen Qi, disharmony of stomach qi, stagnation of qi and accumulation of dampness, phlegm-heat harassing the inner body. The major prescriptions are as fol ows:ErChen Decoction, ZuoJin Pil s, SiJunZi Decoction, SiNi Powder, LiuJunZi Decoction, XiangSu Decoction, WenDan Decoction. There is close correlation between prescriptions and patterns as fol ows:liver qi attacking the stomach and SiNi Powder, ZuoJin Pil s;stagnation of qi and accumulation of dampness and ErChen Decoction,PingWei powder;phlegm-heat harassing the inner body and WenDan Decoction, ErChen Decoction; There is close correlation between herbs as fol ows: Processed Rhizoma Pinel iae and Tangerine Peel, Processed Rhizoma Pinel iae and Poria cocos; Rhizoma Coptidis and Processed Evodia rutaecarpa; Fructus Aurantii and Processed Mangnolia officinalis; Radix Bupleuri and Radix Paeoniae Alba; Poria cocos and Atractylodes;Tangerine Peel and Caulis Peril ae; Poria cocos and Codonopsis pilosula; Radix Bupleuri and Curcuma aromatica. [Conclusion]The incidence and subtype of FD between female group and male group is different. Professor Wang Kungen's therapeutic principles in treating FD are clearing liver and adjusting stomach, soothing liver-qi stagnation,harmonizing stomach and lowering adverse qi, promoting the circulation of qi and resolving dampness and clearing phlegm heat.