This study explored the unstable characteristics of psychological time on moving stimulus to indicate some link between psychological time and space in dynamic conditions. Subjects reproduced the duration of movement displayed on the monitor. The results showed that:(1) the reproduced duration of line and arc was significantly higher than nonocclusive circle and square;(2) contrasting line and arc, the main effect of duration was significant and the mean reproduced duration on direction of left-to-right and up-to-down was significantly higher than right-to-left and down-to-up;(3) The time estimation of arc movement was more close to the linear movement with the arc length than the chord length.