There are thick external science and technology background and internal necessity for the post-modern scientific philosophy to be the important part of post-modernism tide.

This paper intends to show that contextualism avoids not only relativism but also strict scientism and formalism through a discussion about the theoretical background and gist of post-modern scientific philosophy,thus it is the important philosophical formation in post-realism period,and it has provided a base for basic methodology for the reconstruction of scientific philosophy.

With the deconstruction of modern philosophy of science, postmodern philosophy of science emerges as the times require.

In the field of modern western philosophy of science, the schools that hold contrary theses successively emerged and developed and disputed with each other.

Sciencism:the thinking forms and essence of contemporary philosophy;

The life-world turn has been the leading direction of contemporary philosophy.

Then it regards some modern philosophy thoughts as the basis of metatheories and reviews five metatheories researches of information Science,including positivism,constructivism,language game and hermeneutics etc.

Post-modern philosophys appearing makes philosophy reason lapse into non-philosophy.

Reflecting and criticizing traditional philosophy, modern philosophy is changing to return to the life-world.