(Pb$_{1-x}$ La$_{x}$)Ti$_{1-x}$ $_4$O$_3$(x=0, 0.02, 0.04, 0.08) ceramic thin films were fabricated by Sol-Gel method. A stock solution of (Pb, La)TiO$_3$ with excess Pb 10 mol% was made and spin-coated on the Pt/Ti/SiO$_2$/Si substrate at 400rpm for 30 seconds. Coated specimens were dried on the hot-plate at 35$0^{circ}C$ for 10 min and sintered at 500~75$0^{circ}C$ for 1 hour. The dielectric constant, remanent polarization and coercive field of the PLT(6at.%) thin films sintered at $650^{circ}C$ were 884, 13.95$mu$C/$ extrm{cm}^2$ and 8.7kV/cm, respectively. Pyroelectric coefficient, figure of merit of pyroelectric current, voltage responsivity and detectivity of PLT(6at.%) thin films were 3.2$ imes$10$^{-8}$ C/$ extrm{cm}^2$K, 1.02$ imes$10$^{-8}$ C.cm/J, 2.9 $ imes$10$^{-11}$ C.cm/J, 0.29$ imes$10$^{-8}$ C.cm/J, respectively.ely.