1. This paper introduces a new method that measures Brownian movement track and particles size of submicron particles according to Langevin s Brownian movement theory.

2. Brownian movement of colloidal partical is the base to study colloidal properties, but colloidal particle is too small to be observed by naked eye or microscope.

3. Based on the fractional Brownian movement model, a practical approach is presented to detect an artificial target from natural background.

4. The Brownian movement of pollens also shows the fractal characteristics.

5. This additional force is a rapidly fluctuating force, the movement of spins is still free Brownian movement.

6. The increase of internal energy (temperature rise) results from the molecule Brownian Movement.

7. This thesis mainly expound how to found atomic-molecular theory and Einstein's theory on Brownian movement and Perrin's experiment on Einstein's theory.

8. When we study stock market, we usually think that the model of stock price obeys Brownian movement, which log-return characterize normal distribution.