The present invention relates to a device, a system and a method for evaluating the blood microcirculation of a tissue, the device being characterized in that it comprises a housing (8) comprising an open end (82) intended to be placed in contact with said tissue and thus delimit a study surface of said tissue, light emission means (2) to the study surface, image acquisition means (1) of the study surface means for compressing (3, 6) at least one determined area (10) within the study surface, said compressing means (3, 6) being calibrated to apply a controlled pressure to said area (10) and retractable to leave said study surface accessible to said light and the image acquisition means (1), control means (80, 9) controlling the application of said controlled pressure to said area ( 10) for a determined first time, then removing the ladit e controlled pressure and image acquisition on said study surface exposed to said light for a second determined time, data processing means (800, 90) using the acquired images to calculate at least one parameter relating to the discoloration and / or recolouration of said tissue. La présente invention concerne un dispositif, un système et un procédé d'évaluation de la microcirculation sanguine d'un tissu, le dispositif étant caractérisé en ce qu'il comporte un boitier (8) comprenant une extrémité (82) ouverte, destinée à être placée au contact dudit tissu et délimiter ainsi une surface d'étude dudit tissu, des moyens d'émission de lumière (2) vers la surface d'étude, des moyens d'acquisition d'images (1) de la surface d'étude, des moyens de compression (3, 6) d'au moins une zone déterminée (10) à l'intérieur de la surface d'étude, lesdits moyens de compression (3, 6) étant calibrés pour appliquer une pression contrôlée sur ladite zone (10) et rétractables pour laisser ladite surface d'étude accessible à ladite lumière et aux moyens d'acquisition d'images (1), des moyens de contrôle (80, 9) contrôlant l'application de ladite
