Abstract: Phase behavior and rheology property of LAS/AEO-9/C3H8O3/H2O were studied with polarizing microscope and RS75 rheometer. The results show that only lamellar phase could be observed on the side of the LAS/C3H8O3/H2O of the phase diagram. On the side of the AEO-9/C3H8O3/H2O, the changes of phase of the surfactant solution were different. With the increasing of surfactant concentration, the phase in the solution changed from micelle solution to hexangular phase, gradually. The patterns of lamellar phase and hexangular phase have been observed under polarizing microscope. The results of rheology corresponded to the phase behavior.