New mothers would sometimes have different opinions with grandparents on taking care of babies. When dealing with the disagreements or even conflicts，new mothers will be influenced by new media for they have a regular use of health resources on it. By combining social support theory with “Uses and Gratifications” theory，researcher comes up with a concept of “supportive instrument”，in order to illustrate how new media can be employed by new mother as a tool to meet own needs and support themselves. 14 new mothers were interviewed. The result shows that in the negotiation with grandparents about disagreement on maternal and child health，new mothers can use media to learn parenting，reinforce own point of view and in turn influence grandparents. <<