This paper expounds the theory of three worlds of K. Popper, the grade sequencing method and the logarithmic perspective law, and based on this, expounds the basic equations of Brooks information science.

• 论述了波普的三个世界理论、等级排序法和对数透视定律,在此基础上,重点论述了布鲁克斯的情报学基本方程。