Abstract: A constant temperature environment-continuous titration calorimeter has been constructed in our laboratory with the components commercially available on the market. The tenability of this instrument has been tested and its sensitivity determined to be 9.91×10^-5kmm^-1. This calorimeter was chemically calibrated with the neutralization of strong acid and base (HCIO₄+NaOH) and the value of △H_N⁰=-13.341 kcalmol^-1was obtained which is quite agreeable with the literature. The results obtained from the measurement of the thermodynamic properties of Ag(Ⅰ)-pyridine complexation reactions conform nicely with those cited in the literiture. The data evaluation procedures have also been improved in the analysis of thermogram.