A photographing direction deviation detection method, comprising: obtaining, by a deviation detection device, a horizontal acceleration of an image capturing device at each of a plurality of time instants in a pre-determined time period, the horizontal acceleration being a vector having a value and a direction, and obtaining, by the deviation detection device, an initial moving speed of the image capturing device, the initial moving speed being a vector having a value and a direction, wherein the initial moving speed indicates a moving speed of the image capturing device in a horizontal direction at a start time instant of the pre-determined time period; calculating, by the deviation detection device, a horizontal moving speed of the image capturing device at each of the time instants in the pre-determined time period based on the initial moving speed and the horizontal acceleration of the image capturing device at each of the time instants; setting, by the deviation detection device, a weight for the horizontal moving speed of the image capturing device at each of the time instants in the pre-determined time period, such that the weight is in positive correlation with the value of the horizontal moving speed, and aggregating, by the deviation detection device, the horizontal moving speeds of the image capturing device at the time instants in the pre-determined time period based on the set weights to obtain an aggregated horizontal moving speed; determining, by the deviation detection device, a horizontal straight-forward direction of a vehicle based on a direction of the aggregated horizontal moving speed; determining, by the deviation detection device, a target photographing direction of the image capturing device based on the horizontal straight-forward direction of the vehicle and a pre-determined relationship between the horizontal straight-forward direction and the target photographing direction; and determining, by the deviation detection device in a case that a direction angle satisfies a preset condition, that an actual photographing direction of the image capturing device deviates, wherein the direction angle indicates an angle between the target photographing direction and the actual photographing direction of the image capturing device at an end time instant of the pre-determined time period. obtaining, by a deviation detection device, a horizontal acceleration of an image capturing device at each of a plurality of time instants in a pre-determined time period, the horizontal acceleration being a vector having a value and a direction, and obtaining, by the deviation detection device, an initial moving speed of the image capturing device, the initial moving speed being a vector having a value and a direction, wherein the initial moving speed indicates a moving speed of the image capturing device in a horizontal direction at a start time instant of the pre-determined time period; calculating, by the deviation detection device, a horizontal moving speed of the image capturing device at each of the time instants in the pre-determined time period based on the initial moving speed and the horizontal acceleration of the image capturing device at each of the time instants; setting, by the deviation detection device, a weight for the horizontal moving speed of the image capturing device at each of the time instants in the pre-determined time period, such that the weight is in positive correlation with the value of the horizontal moving speed, and aggregating, by the deviation detection device, the horizontal moving speeds of the image capturing device at the time instants in the pre-determined time period based on the set weights to obtain an aggregated horizontal moving speed; determining, by the deviation detection device, a horizontal straight-forward direction of a vehicle based on a direction of the aggregated horizontal moving speed; determining, by the deviation detection device, a target photographing direction of the image capturing device based on the horizontal straight-forward direction of the vehicle and a pre-determined relationship between the horizontal straight-forward direction and the target photographing direction; and determining, by the deviation detection device in a case that a direction angle satisfies a preset condition, that an actual photographing direction of the image capturing device deviates, wherein the direction angle indicates an angle between the target photographing direction and the actual photographing direction of the image capturing device at an end time instant of the pre-determined time period.