Is it allowed to kiss the Holy Qur'an just for respect, because it is the Word of Allah, the Almighty? According to Qur'an and Hadith.

Praise be to Allah, the Lord of the Worlds; and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
There is no evidence from the Qur'an or the Sunnah concerning kissing the Musahaf. Imam Ahmad was once asked about that. He replied: "I have not heard anything about this thing". But it is narrated that Ikrima (a companion of the Prophet) used to open the Musahaf and put his face on it and say: "The book of my Lord, the speech of my Lord". It is also narrated from Ibn Abi Al-Saif Al-Yemani (a Shafia Scholar in Makkah) that he said "kissing the Qur'an is Lawful". So, its lawfulness is apparent, however one should not make it a habit or believes that this act has some advantage whatsoever in it.
Allah knows best.