Identifying the danger and expressing the indeterminacy of forfeiting perching space of species induced by rapid climate warming is crucial for biodiversity risk management under future changes in climate conditions. The scenarios of climate shift named the representative concentration pathways, the categorizing technique with regard to fuzzy-set, and Monte Carlo scheme was employed to survey the indeterminacy and the danger of forfeiting perching space caused by climate warming for 115 bryophytes in China. For the deterministic scenarios of climate shift, the richness of 115 bryophytes improved in several areas in north-eastern China, while it dropped in some areas in southern, eastern, south-eastern, and central China. In addition, for the deterministic scheme of altering climatic state, the count for bryophytes with the proportion of contracting the present areal range as less than 20%, 20–40%, 40–60%, 60–80%, and over 80% was belike 34–38, 19–38, 24–35, 9–19, and 4–9, separately; the count of bryophytes with the ratio of the occupying entire areal range as over 80%, 60–80%, and less than 20% was roughly 97–109, 4–14, and 2–8, separately. For the scenarios of randomly change in climate state, the number of bryophytes with a various proportion of forfeiting the present perching space dropped with enhancing the possibility; with the likelihood beyond 0.6, the count of bryophytes with forfeiting present perching space as less than 20%, 20–40%, 40–60%, 60–80% and high than 80% of the present areal range was approximately 7–14, 2–10, 0–7, 2–9, and 13–20, separately; the number of bryophytes with the ratio of occupying the whole areal range as less than 20%, 20–40%, 40–60%, 60–80%, and over 80% was more or less 1–3, 0–3, 1–5, 1–3, and 38–44, separately. Roughly 48 bryophytes would face the risk of extinction from climate warming, including endemic and non-endemic species. Forfeiting perching space induced by climate warming would cause variations in species composition and the disappearance of some ecological functions associated with these bryophytes. The inconstancy of forfeiting areal range caused by climate warming should be incorporated into the policy-making of conservation bryophytes for adaptation of climate warming.