The present study is aimed at discussing two subjects which are currently hot issues among scholars. The first of these subjects is a measurement of the deviation of the structure's square foundation stone fromthe meridian at that place. The measured deviation turned out to be 19 degree which is even larger than previously assumed. Is this deviation really evidence that the structure should not be considered an astronomical observatory? Of course not. The reason for this is given.

The second subject considered is the type of use made of the Chomsongdae for astronomical purposes. Many people are arguing that the upper enclosure of the structure does not seem to have enough space for observational work to be done. The size of the space may be too small for the use of large instruments, but too small for the use of large instruments, but the opposite conclusion would also be concievable, if one makes the simple assumption that ancient astronomers kept a continual watch of the sky, day and night, without using any sophisticated tools.

In dealing with ancient remains like Chomsongdae one should take great care not to treat them in terms of our modern scene. There exists at least a 1300 year gap between then and now!