Techniques for measuring the emotional state of minds in a person based upon a set of biological data captured from a person in a natural environment, where the person is not restricted at all in his movement. Various sensing data from sensors are captured with or without the intervention of the person. In addition, expression data is also captured before, during or after the sensing signals are captured. The data sets are processed to filter out those uncorrelated. A dedicated computing device is provided to collect the data along with other necessary data available on the Internet, where the measurement of the emotion is measured, derived or calculated based on the collected data, and/or any historical measurements of the person. The result may be shared with a list of contacts selected by the person who may also views theirs as well.
