think of侧重点记起、有意做某事、想象。think about侧重于思考、思索、考虑。think of的对象既可以指人也可以指事物。think about的对象一般指事物。

1、think of：I just can't think of her name.我就是记不起她的名字。2、think about：I will think about the plan，and see if it is feasible.我会考虑这个计划，看看可不可行。