Abstract: Husserl's research on knowing activities led to the development of his phenomenology. By clarifying the concept of logic， Husserl claimed the task of epistemology is to answer two questions: the justification of knowledge and the possibility of knowledge. By transcending the transcendent answer to the question of possibility of knowledge， Husserl gradually proposed the phenomenological epistemology with the method of Epoché， which also became the starting point of his phenomenology. In comparison with the contemporary epistemological research on the same question， Husserl's phenomenological epistemology is a study on the general laws of cognitive activity， while contemporary epistemology is a specific study on the problems of knowledge—the fruit of our cognition， which is a fundamentally different kind of research， with the latter grounded in the former.

Key words: logic; phenomenological epistemology; justification of knowledge; presuppositionlessness; possibility of knowledge