Philosophy of information should not be taken as the study of philosophical problems in information science and information technology,nor be considered as a certain philosophy branch which is affiliated to or can be summed up into any existing traditional philosophy."Partition of the existential field"is the highest paradigm of philosophy;thus revolution of philosophy can be brought about only in the level of its highest paradigm.For traditional philosophy,"Existence=matter+spirit"is the highest paradigm and also the base of philosophy theories.Contemporary philosophy of information has made a new partition of existential field as"Existence=matter+information(spirit as the advanced form of information)".Philosophy of information has achieved fundamental transformation of philosophy for the first time since it triggered radical change in the highest paradigm of philosophy.