Disclosed herein are methods, systems and devices for evaluating a health condition of an Internet user. In one embodiment, the method comprises acquiring Internet activity data associated with a plurality of users, the plurality of users including a first user; selecting a set of sample users from the plurality of users based on a plurality of specified Internet activities identified in Internet activity data associated with the first user; extracting characteristic data for the first user and the set of sample users from the Internet activity data; utilizing the characteristic data as at least one parameter of a health index calculation model; and calculating a health index for the first user based on the health index calculation model.
Methods, Systems, and Devices for Evaluating a Health Condition of an Internet User