[Objectives]  To investigate the use of visual and olfactory information during foraging by the butterfly Papilio memnon. [Methods]  The cues used by P. memnon to locate food plants were investigated using different colored artificial flowers and artificial flowers sprayed with honey water. In addition, the antennal responses of P. memnon to floral volatiles were measured with an Electroantennogram (EAG), and significant responses to specific volatiles were later verified in behavioral trials. [Results]  When given a choice between 7 colours of odorless, artificial flowers butterflies displayed an obvious preference for blue (440-475 nm), purple (380-420 nm) and red (615-630 nm), flowers. The application of 10% honey solution to these flowers resulted in a 1.85-fold increase in the mating frequency of female and male butterflies. Butterflies did not respond to a single odor (honey, benzyl, alcohol or benzaldehyde). However, the application of honey to artificial blue flowers was followed by a 27.4 fold increase in the chasing frequency of adults, and the application of benzyl alcohol and benzaldehyde increased the number of visits to these flowers by 52.59 and 75.80 fold, respectively. Compared to color, color plus honey solution increased the number of visits by 1.41 times, whereas the use of benzyl alcohol and benzaldehyde increased the visitation rate by 2.67 and 2.16 times, respectively. Females were more responsive than males to both color and volatile compounds (P<0.05). [Conclusion]  Color is the main factor influencing the foraging activity of P. memnon. Single odors have a limited effect, olfaction playing a secondary, but complementary, role to vision. Females have better color and odor recognition than males, which may be related to their reproductive role.