Three experiments investigated the effects of cognitive styles on car driver's fixation behavior. The eye movement parameters of participants (N1= 48, N2 = 31, N3 = 31) with different cognitive styles (field-dependence/independence) were collected by Smart Eye Pro. Results indicated that FD group fixed AOIs slower (p=0.030) and with less fixation counts (p=0.046) than FI group while observing static pictures of driving scenarios (Experiment 1). FD group had less fixation counts (p=0.005) and fixation time (p=0.039) on AOIs, more lateral deviation errors (p=0.005) than FI group while driving on the general city road in the driving simulator (Experiment 2), especially in pressure situations (Experiment 3). In addition, for all participants under pressure, Automated driving parameters such as driving speed (p=0.033) and response time to braking (p=0.014) were significantly increased (Experiment 3). Conclusion: Field-independent drivers could pay more attention to the key information on road, and stress impaired driving ability.