A modular lighting device with multi-region detection function, comprising: a housing ; and a light-emitting diode (LED) module ; and characterized by further comprising: a rotary spherical seat , which comprises a bottom base and a sphere , the sphere having a front end portion comprising a plurality of positioning holes formed therein; a detection module , which comprises a plurality of sensors mounted on a substrate , the sensors being respectively embedded in the positioning holes ; a control module , which has a front end on which a camera lens is mounted to be embedded in one of the positioning holes , the control module being arranged to extend through a central portion of the detection module ; a fixing casing , which is arranged outside the rotary spherical seat and mounted to an upper end of the housing to constrain a rotational range of the sphere ; and a main power supply board , which is electrically connected to the LED module , the detection module , and the control module to allow the control module to drive the LED module and the detection module to each perform a corresponding operation and achieve functions of detection, recording, and lighting in multiple ranges, wherein the detection module and the control module are adjustable in angular positions thereof. a housing ; and a light-emitting diode (LED) module ; and characterized by further comprising: a rotary spherical seat , which comprises a bottom base and a sphere , the sphere having a front end portion comprising a plurality of positioning holes formed therein; a detection module , which comprises a plurality of sensors mounted on a substrate , the sensors being respectively embedded in the positioning holes ; a control module , which has a front end on which a camera lens is mounted to be embedded in one of the positioning holes , the control module being arranged to extend through a central portion of the detection module ; a fixing casing , which is arranged outside the rotary spherical seat and mounted to an upper end of the housing to constrain a rotational range of the sphere ; and a main power supply board , which is electrically connected to the LED module , the detection module , and the control module to allow the control module to drive the LED module and the detection module to each perform a corresponding operation and achieve functions of detection, recording, and lighting in multiple ranges, wherein the detection module and the control module are adjustable in angular positions thereof. a rotary spherical seat , which comprises a bottom base and a sphere , the sphere having a front end portion comprising a plurality of positioning holes formed therein; a detection module , which comprises a plurality of sensors mounted on a substrate , the sensors being respectively embedded in the positioning holes ; a control module , which has a front end on which a camera lens is mounted to be embedded in one of the positioning holes , the control module being arranged to extend through a central portion of the detection module ; a fixing casing , which is arranged outside the rotary spherical seat and mounted to an upper end of the housing to constrain a rotational range of the sphere ; and a main power supply board , which is electrically connected to the LED module , the detection module , and the control module to allow the control module to drive the LED module and the detection module to each perform a corresponding operation and achieve functions of detection, recording, and lighting in multiple ranges, wherein the detection module and the control module are adjustable in angular positions thereof. <EOS>