抱著學習的態度，對李德建先生的《老子大道科學體系若干重要觀點》一文，進行討論。李文共14節，需討論的問題甚多，本文主要討論1-4節所涉問題。首先是老子所說的「道」與科學的關係，二者既不完全等同，也不是絕對矛盾，而是可以互參互證。各有各的途徑、作用，難以完全取代。李文主張以「內求法」「扭轉科學發展取向」，這不可能，也沒必要。豈不知「修煉」絕非易事。其次，針對李文「大道科學（沒有基本粒子）」的觀點，本文認為「『道』的本質特徵是『小』」，分三個議題：第一，「道」，是不是「鋼板一塊」「不能離析」？第二，關於「精」的討論；第三，21、25兩章內容的關聯與區別。本文第三部分，針對李文「二、大道時間觀（時間隧道）」；「三、大道空間觀」；「四、大道運動觀」三節中的問題，略作討論。

With a humble and learning attitude, this article discusses about Several Important Views about Laozi Grand Tao Science System from Mr. Dejian Li. Mr. Li's article has 14 chapters, which has so many topics to discuss. Therefore, this article only focuses on chapter 1 to 4. First of all, the relationship between Tao and science. The two parties are not equal and also not absolute contradictory but mutual referenced. Each of them has its own method and function, it is hard to be replaced. Mr. Li claims to use ＂Within Seeking Method＂ to replace science but ignoring practice is not easy. Secondly, Mr. Li holds the opinion of ＂Grand Tao Science＂ (without elementary particles). This article argues the essence of Tao is Small. This topic is divided into 3 subtopics. Firstly, is Tao a piece of steel plate and not able to be decomposed？Second, discussion about ＂Jing＂ (Essences). Third, the connections and differences between the content of Capital 21 and 25. The Last part of this article discusses about 3 chapters from Mr. Li's article, namely ＂2^(nd) , Grand Tao's Time Concept, 3^(rd) , Grand Tao's Space Concept and 4th , Grand Tao's Movement Concept＂.