This paper presents a fabrication method for a piezoelectric paint sensor, and its application to impact and vibration monitoring of a beam structure. The piezoelectric paint in the paper is composed of Pb(Nb,Ni)O3-Pb(Zr,Ti)O3 (PNN-PZT) powder and epoxy resin. The piezoelectric paint has been coated on an aluminum beam structure, and the electrode has been made on the upper surface of the piezoelectric paint using silver paste. By using the aluminum structure as the opposite electrode, the poling of the PNN-PZT/Epoxy paint has been conducted successfully at room temperature with the electric field of 4 kV/mm for 30 min. When the cantilevered aluminum beam was under several vibration conditions, especially resonance, the vibration response has been monitored by measuring the output voltage from the piezoelectric paint sensor. The output voltage responses to the in-plane deformation(strain) of the beam structure, so the displacement-strain transformation technique has been used in order to obtain out-of-plane deformation. The transformed out-of-plane deformation from the paint sensor was compared with the measured from laser displacement sensors at a certain beam position. The results showed that the estimated data matches the measured and, moreover, the deformations at various points along the beam length also can be obtained from the displacement-strain transformation technique. In addition to the vibration, impact signal also can be easily monitored using the piezoelectric paint, because the piezoelectric paint is inherently more sensitive to higher frequency signals. By using the impact hammer, several impacts have been applied to the beam structure. The impact monitoring test results showed that the impact force signal over 10N can be captured using the piezo-paint.