A computer-implemented method for controlling a smart mirror system configured to provide guidance to a subject in an unobtrusive manner, the method comprising: acquiring one or more conditions under which data required for analyzing a first biological parameter of the subject is to be captured; determining, based on the one or more conditions, one or more requirements associated with at least one of: an orientation of a body part of the subject, a position of a body part of the subject, a movement of a body part of the subject, and a level of a second biological parameter of the subject; acquiring, based on the one or more requirements, at least one of: a current orientation of the body part of the subject, a current movement of a body part of the subject, a current position of the body part of the subject, and a current level of the second biological parameter of the subject; determining a required adjustment of at least one of: an orientation of the body part of the subject, a position of the body part of the subject, and a second biological parameter of the subject, based on the respective requirement and the acquired information associated with the respective requirement; generating guidance for the subject based on the determined required adjustment by determining at least one of a relative position and an attribute of a visual element that is to be outputted by a user interface of the system so as to induce the subject to achieve the required adjustment, wherein the attribute of a visual element that is to be outputted by a user interface of the system comprises at least one of: a viewing angle of the visual element, a viewing depth of the visual element, a viewing distance of the visual element, and a size of the visual element; and providing the visual element in the form of an active window displayed via the user interface, wherein: the user interface is a screen incorporated at a reflective component of the smart mirror system; and the first biological parameter is one of: a level of oiliness of the skin of the subject, a level of elasticity of the skin of the subject, a parameter relating to a condition (e.g. acne, eczema) on the face of the subject, such as a level of redness of an eczema region, or the extent of plague on the teeth of the subject. acquiring one or more conditions under which data required for analyzing a first biological parameter of the subject is to be captured; determining, based on the one or more conditions, one or more requirements associated with at least one of: an orientation of a body part of the subject, a position of a body part of the subject, a movement of a body part of the subject, and a level of a second biological parameter of the subject; acquiring, based on the one or more requirements, at least one of: a current orientation of the body part of the subject, a current movement of a body part of the subject, a current position of the body part of the subject, and a current level of the second biological parameter of the subject; determining a required adjustment of at least one of: an orientation of the body part of the subject, a position of the body part of the subject, and a second biological parameter of the subject, based on the respective requirement and the acquired information associated with the respective requirement; generating guidance for the subject based on the determined required adjustment by determining at least one of a relative position and an attribute of a visual element that is to be outputted by a user interface of the system so as to induce the subject to achieve the required adjustment, wherein the attribute of a visual element that is to be outputted by a user interface of the system comprises at least one of: a viewing angle of the visual element, a viewing depth of the visual element, a viewing distance of the visual element, and a size of the visual element; and providing the visual element in the form of an active window displayed via the user interface, wherein: the user interface is a screen incorporated at a reflective component of the smart mirror system; and the first biological parameter is one of: a level of oiliness of the skin of the subject, a level of elasticity of the skin of the subject, a parameter relating to a condition (e.g. acne, eczema) on the face of the subject, such as a level of redness of an eczema region, or the extent of plague on the teeth of the subject. the user interface is a screen incorporated at a reflective component of the smart mirror system; and the first biological parameter is one of: a level of oiliness of the skin of the subject, a level of elasticity of the skin of the subject, a parameter relating to a condition (e.g. acne, eczema) on the face of the subject, such as a level of redness of an eczema region, or the extent of plague on the teeth of the subject. a level of oiliness of the skin of the subject, a level of elasticity of the skin of the subject, a parameter relating to a condition (e.g. acne, eczema) on the face of the subject, such as a level of redness of an eczema region, or the extent of plague on the teeth of the subject.