The present invention refers to real estate price sale in line segment ocean whether payment for a portion during a period for sale may determine self stable set to correspond to the plurality of rights to a dwelling estate to guaranteed and may activate a line segment ocean to estate sale management system and method relates to, in real estate line segment oceanselling price estate then option, for a portion of real estate of completion building is finished at the time, the total real estate that owns a real estate fire lead real estate of the vectorized only sucking paper powder according to price payment elongate owned by paper powder and the corresponding occupied while expected of the vectorized according to allocation, which may be for a can be selected according to real estate novel by a perioral of resident satisfaction level and may activate a line segment ocean moves the probe units in one.. Furthermore, to enable the real estate according to line segment ocean self a handbill completion or perioral to selection part decides whether or payment real estate in real estate payment even if no radio-base-paper powder according to cost payment to dwelling and while to protect a building sale to own rights, said paper powder corresponding to real estate contract is the aim non-residential period investor to flier conditions for investor the aim non-residential the sold at the investment by activating the construction and real estate while stock-burden-reducing' s sale including a perioral entire is applied during construction yarn (yarn enforcing) select a Company is stable, and the provided to prevent..