A system for measuring displacement in civil structures based on vision through targets, comprising • A target • One or more measuring devices wherein each measuring device is configured to be attached to a fixed area and is associated with the target attachable to an area of the structure to be analyzed, wherein the target comprises an outward facing face with two or more through holes and an interior illumination device facing said through holes, wherein each measuring device comprises • a high resolution camera with a long focal length lens capable of continuously capturing images of the target, wherein the resolution value and focal length are determined as a function of the distance between the camera lens and the target; • a processing unit for processing said target images continuously and autonomously, capable of calculating the vertical (y) and/or horizontal (x) and/or angular (α) variation of the area to be analyzed by detecting the target holes, calculating their centroid and comparing the position of said centroid in different image processing; • a wireless communications module of the processing unit with a web platform for storage, processing and presentation of the results comprising data analysis and control software, and; • means of autonomous power supply. • A target • One or more measuring devices wherein each measuring device is configured to be attached to a fixed area and is associated with the target attachable to an area of the structure to be analyzed, wherein the target comprises an outward facing face with two or more through holes and an interior illumination device facing said through holes, wherein each measuring device comprises • a high resolution camera with a long focal length lens capable of continuously capturing images of the target, wherein the resolution value and focal length are determined as a function of the distance between the camera lens and the target; • a processing unit for processing said target images continuously and autonomously, capable of calculating the vertical (y) and/or horizontal (x) and/or angular (α) variation of the area to be analyzed by detecting the target holes, calculating their centroid and comparing the position of said centroid in different image processing; • a wireless communications module of the processing unit with a web platform for storage, processing and presentation of the results comprising data analysis and control software, and; • means of autonomous power supply. • a high resolution camera with a long focal length lens capable of continuously capturing images of the target, wherein the resolution value and focal length are determined as a function of the distance between the camera lens and the target; • a processing unit for processing said target images continuously and autonomously, capable of calculating the vertical (y) and/or horizontal (x) and/or angular (α) variation of the area to be analyzed by detecting the target holes, calculating their centroid and comparing the position of said centroid in different image processing; • a wireless communications module of the processing unit with a web platform for storage, processing and presentation of the results comprising data analysis and control software, and; • means of autonomous power supply.