With unique surface plasmon resonance and high potential for many important applications, plasmonic nanostructures are attracting more and more attention in the past decade. In addition to ever increasing research interest in realizing precise control over their structure (such as size, shape, aspect ratio and uniformity), plasmon enhanced catalysis represents a highly promising research area. In this presentation, the development of several types of plasmonic nanostructures by wet chemical method or pulsed laser ablation will be introduced first. Their interesting optical properties and their applications in photocatalysis will then be presented and discussed.