The present invention relates to an instant cosmetic preparation device for selectively stirring a main cosmetic substance and a subordinate substance contained therein or using a prepared ampoule so as to instantly prepare a cosmetic as the user desires, and a throwaway mixing container therefor. To this end, the instant cosmetic preparation device is characterized by including: a housing of a given shape a finished product container transfer part for transferring a finished product container filled with a cosmetic mixture stored inside the housing to a sealing position under the users control a sealing part arranged inside the housing for sealing the mouth of the finished product container and a control unit arranged inside the housing for controlling the operation of the sealing part to seal the mouth of the finished product container, and the throwaway cosmetic mixing container is characterized by including: a box-shaped body having at least one discharge hole and an internal space with an open top a plurality of ampoule insertion holes arranged in one side of the body for receiving an ampoule storing a raw material a mixing means arranged in the internal space for mixing two or more raw materials stored therein and an opening/closing means arranged in the lower side of the body and having a discharge opening connected to the discharge hole so as to discharge to the outside the mixture of the mixing means at the lower side of the body. Thus, the present invention enables an ordinary user to directly and instantly prepare a suitable cosmetic by means of the chief and the subordinate material chosen by the user as desired.
