Abstract:The “double evaluation” composed of resources and environment carrying capacity evaluation and land and space development suitability evaluation has been elevated to the strategic height of the basis for the preparation of land and space planning. Through combing the research progress of “double evaluation”, it is pointed out that there is still a lack of research on its internal logic and the corresponding external positioning of the two evaluations. Unclear result logic, scale logic and driving logic lead to the confusion of external positioning including role orientation, level matching and main structure, limiting the feasibility of applying the evaluation results to land and space planning. As a result, this paper reclarifies the internal logic of “double evaluation” and then clarifies the corresponding external positioning with optimizing the evaluation path of “series progressive” to “seriesparallel hybrid”, which provides ideas and references for improving the effective support capacity of “double evaluation” for land and space planning.