The invention provides a movable building greening device, which is applicable to buildings and includes a bearing body, a power module and a control module.The bearing body is movably arranged on the building； the bearing body carries plants.The power module drives the load-bearing body to move to the wall outside the building or retract to the roof.The control module controls the power module to drive the carrier to move.In this way, plants form green curtain on the buildings, which has the function of shading sunlight and greening, so as to achieve the purpose of urban beautification； more importantly, plants absorb solar energy and release oxygen, so as to reduce the temperature inside and outside the buildings and improve the air quality, so as to effectively reduce the air conditioning power consumption in the buildings, thus achieving the effect of energy conservation and carbon reduction.本創作係提供一種活動式建築綠化裝置，其適用於建築物，且包含承載體、動力模組以及控制模組。承載體可移動地設於建築物上；承載體上承載植物。動力模組帶動承載體移動至建築物之外牆面或收回至屋頂上。控制模組控制動力模組帶動承載體移動。藉此，植物在建築物上形成具有遮蔽陽光及綠化作用的綠色牆幕，以達到城市美化之目的；更重要的是，植物吸收太陽光能並釋放出氧氣，以降低建築物內外的溫度以及改善空氣品質，藉此有效減少建築物內的空調用電量，進而達到節能減碳之效果。
