In the play “A raisin in the sun,” the author depicted the environment of Walter Lee’s family. In the family of Lee, everyone has a goal to achieve: “Lee is tired of his job, he wants to be rich enough to afford his family; his son Travis and sister Beneatha needs tuition fee to support their education; his wife Ruth has a baby, but she is struggling since her husband considered that would be unaffordable; what Walter’s mother Lena wishing is Walter can take his responsibility to family”. However, due to financial problem, the family was living in a plain house, Lee’s son Travis has to sleep on sofa. On the other hand, the families faced bias, bias to race, gender, and culture, stop them from attending the middle class of society. Even though everyone in the family failed sometimes, they never give up their hope. Especially for Walter Lee and his sister Beneatha, their way to achieve the American dream, is business and education. However, Lee blindly trust his “partner” that there would be no risk for investment, he believed that he will be rich as long as he devote money to something; the over optimistic implied that the “investment” would fail. After Lee experienced a great suffer of losing his property, he realized that what most important to him is dignity, and his family, since they would always support him. According to a series of stage directions, the characteristic of families was shown, make readers understand that plots and characters are always related to each other.