For producing Zno thin film on the ITO glasses at the cathode, we use the electrochemical method to proceed oxidation reduction. It forms Zn(OH)2 at the first, and dehydrates to form ZnO after heating. We use smaller voltage to grow ZnO seeds at the beginning .It can help ZnO to grow stably on the glasses. ZnO has many different characters, when we change solution temperature, contents of disperser(PVP) or the annealing temperature, so my work is to do some research on these factors and discovers how they affect the Zno thin films¡¦ structures ,conductivity, mobility, and the opticals. We found if we don¡¦t grow seeds on the glasses ,the ZnO doesn¡¦t grow well .It grows thicker at the center than the edge. And the disperser changes the morphology of ZnO .The diameter of ZnO particle became smaller. Different annealing temperature and environment also affect the crystallinity, roughness and the character of optical and electricity. We use every type of the ZnO thin films we did on the DSSC to research what is the factor that affects the efficiency.