The question how"alter ego"is possible may be regarded as a fascinating but hard nut to crack since ancient times. In transcendental identifying ego's framework, Hussel constructed a kind of intersubjectivity from the structure of space and immanent time-consciousness by the monads. Although this theory couldn't give an ultimate solution because of absence of some enough strong interpretation to some key logic links, all of the energy that lies in this solution has not yet been valued seriously and released affectly.