Thanks a lot all,
I fixed it using TimeAlarm is perfect idea.
And also, for other person that have similar problems,while using TimeAlarm example,i have one more problem which says:
C:\arduino-1.0\libraries\TimeAlarm\TimeAlarm.cpp:268: error: 'millis' was not declared in this scope
And than,I solve it with these;https://www.element14.com/community/thread/16455
Link says that find these adress Documents/Arduino/Libraries/TimeAlarm/TimeAlarm.cpp
and open it and change the #include < WProgram.h > line to #include < Arduino.h >
You can also use these unit;https://www.sparkfun.com/products/99
it provides you real timing.Moreover,you turn the arduinos power off,unless you think if the setting time will be gone.With other words,you shouldn't set the arduino's time,like in the example every upload bacause of the fact that it has a simple timer logic,you set the time and date,though.
Thanks again for your interest,
See you in next project,questions or solutions.