A text detection method and system, a device and a storage medium. The method comprises: performing subtractive colour processing on each image in a three-colour channel of a target image to obtain a subtractive colour image, and converting the target image into a binary image (101); merging connected blocks with the same colour in the subtractive colour image and merging connected blocks with the same colour in the binary image (102); respectively merging the connected blocks of each colour channel of the three-colour channel of the subtractive colour image and the connected blocks in the binary image in the vertical and horizontal directions in a connected manner, so as to obtain a candidate text area in the target image (103); and extracting a specific area on a position corresponding to the candidate text area in the target image, and based on a comparison result of the probability of a text area being included in the specific extracted area and a pre-set probability threshold value, determining whether the extracted specific area includes a text row or a text column (104). Accurate detection can be performed on text in an image.