Abstract: A novel method based on three-dimensional holographic vector of atomic interaction field (3D-HoVAIF) was employed to express 3D structures of 68 dihydrofolate reductase (DHFR) inhibitors and 48 bitter tasting thresholds (BTT). Better model was developed based on multiple linear regression (MLR) through a stepwise manner for DHFR and genetic arithmetic-partial least square for BTT, and the following results were obtained: the multiple correlation coefficient (Rmm2) of 0.893 and 0.936, the cross validated RCV2 of 0.853 and 0.849 by the leave-one-out procedure, respectively. atisfactory results showed that information related to biological activities of DHFR and BTT can preferably be expressed by 3D-HoVAIF with definite physical and chemical meaning, easy interpretation, and well understanding, which may become a useful structural expression technique to study quantitative structure-activity relationships (QSAR) for various bioactive substances.