“Grassroots culture” emphasizes the main body of culture rather than the property of culture and has become an important form of “people’s culture” in new media era. Elitist’s political identification on the grassroots culture is not consistent with the facts. Grassroots culture as civilian culture has a nonelite, civilian, pluralistic and other features. It is closely related to the changes of media and is not necessarily to become the vulgar culture. From existential perspective, grassroots culture is conducive to the development of cultural individuality, social justice appeal, improvement of the status of the people, and dilution of the solidified cultural interests (collectivization) and so on. Of course, this new culture at the same time has a disadvantage on building the core values of socialism and social culture identity, and even the irrational collective madness and violence of culture may lead to more social worries. It is possible to guide and sublate the new culture only based on deeply mastering new media information formation and transmission mechanism.