The invention discloses an investigation method for measuring the real estate investment value of a plot, and relates to a real estate market investigation method, which comprises the following steps:performing local small-scale preliminary investigation on a people stream focusing place around a target land parcel in addition to an existing market investigation method; counting the effective data volume of the preliminary survey; analyzing the effective data volume in combination with matching around the plot, and determining a target crowd; designing a questionnaire survey table, and training research personnel; guiding investigation personnel to execute investigation through a telephone, a field and a network, and counting the distribution of effective data volume; eliminating invaliddata, and optimizing a questionnaire survey table; continuously guiding research personnel to carry out research work, and carrying out statistics on distribution of effective data volume; and finishing an investigation report within the deadline. According to the invention, more accurate consumer purchase analysis data can be obtained for real estate developers during plot investment; urban planning and effective combination of existing data and pre-investment plot area conditions can be realized.