In this thesis, it is investigated the characteristics of Dye Sensitized Solar Cell (DSSC) according to variation of $TiO_2$ thickness (6, 12, 18, and $24{mu}m$) and three distinct $TiO_2$ sintering temperatures (350, 450 and $550^{circ}C$) by XRD, SEM, I-V and UV-Vis spectrophotometer. According to sintering temperature, $TiO_2$ was transformed into the anatase structure at $350^{circ}C$, rutile structure at $550^{circ}C$ and further into the two structure at $450^{circ}C$. With increasing thickness up to $18{mu}m$ and sintering temperature up to $450^{circ}C$, respectively, the irradiance rate increased in the range of 9~26 percent and 2.80~5.10 percent. Whereas a further increase to $24{mu}m$ and $550^{circ}C$, the irradiance rate decrease in the range of 4~11 percent and 30~47 percent. The conversion efficiency increased in the range of 2.80~5.01 and 3.03~5.01 with increasing thickness up to $18{mu}m$ and sintering temperature up to $450^{circ}C$. By contrast, increase to $24{mu}m$ and $550^{circ}C$, the conversion efficiency decreased in the range of 3.31~5.01 and 2.80~3.89, respectively. The DSSC that thickness of $TiO_2$ were $18{mu}m$ and sintered at $450^{circ}C$ exhibited the most excellent characteristics, in which open-circuit voltage, short-circuit current, Fill Factor and conversion efficiency are 0.69 V, $11.4mA/cm^2$, 0.64 and 5.01%, respectively.