What did Kant said about empiricism and rationalism?

Roughly speaking, Kant's position is in between empiricism and rationalism. For Kant, our experience is a product of both raw sense "data" (an empirical element) and transcendental concepts that organize this data (a rational element). The result is that we can have knowledge about some things without experience from the outside world because of these forms, such as our knowledge about mathematics, but what we can hope to know is ultimately limited by what transcendental forms of thought we have, thus undermining out ability to have sure metaphysical knowledge.

I will not explain the terms he used exactly, since it is too complicated. You should 1) learn German and then 2) read the "Critique der Reinen Vernunft", wann Sie mehr wissen wollen.