Solar energy and carbon were mostly fixed in the ecosystem through plant photosynthesis. Photosynthesis is the most important chemical reaction on the earth. Many graduate students measured plant photosynthesis to present plant performance and health. The ecosystem productivities could be further modeled by plant photosynthetic ability. This course was aimed to help graduate students more aware of the photosynthetic parameters which they measured and calculated. The course would include the introduction of concept of photosynthesis, involved organelles and enzyme systems and controlling factors. The course would also include the operation of instruments and the calculation and model of photosynthesis of plant individual, population and ecosystem.